From 34835fb59b3d5f824f3aedc79feb23c5b57c15be Mon Sep 17 00:00:00 2001 From: THOClabs Date: Thu, 6 Aug 2026 23:36:55 -0700 Subject: [PATCH] =?UTF-8?q?docs(presentation):=20NIGHTWATCH=20unveiling=20?= =?UTF-8?q?keynote=20=E2=80=94=20107-slide=20cinematic=20deck?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Self-contained HTML keynote (~3 h, six acts + intermission) unveiling the optics program, built on the repo's High Desert Brass design system: - Every engineering figure computed live in vanilla JS/SVG from the real design constants: exact meridional ray trace through the seed prescriptions (f/6 and f/8, toggleable), annular-pupil MTF with a live obstruction slider, Airy/Strehl physics, CTE glass ladder, lucky-imaging exponential, sampling/DoF/FOV, budget, phases, the mount PASS/FAIL ledger, and the parametric CAD preview. Physics smoke-tested headlessly (MTF matches the annular autocorrelation reference within 0.2 pp; clear-aperture curve matches the analytic form to 4 decimals). - Embedded latin woff2 subsets (Space Grotesk / Fraunces / JetBrains Mono); zero external requests; Rubylith night-vision theme on the R key; speaker notes with cumulative timing cues on every slide; overview, presenter clock, print handout mode. - docs/presentation/README.md: run of show, keys, AV notes. Also fixes a sign-convention erratum the deck's fact-verifier caught in the optical roadmap: the achromat condition reads R2−R1 = −0.565·t for our (negative-radii) sign convention, not R1−R2 (3 occurrences). Co-Authored-By: Claude Fable 5 --- design/optical/OPTICAL_ENGINEERING_ROADMAP.md | 6 +- docs/presentation/NIGHTWATCH_UNVEILING.html | 2480 +++++++++++++++++ docs/presentation/README.md | 50 + 3 files changed, 2533 insertions(+), 3 deletions(-) create mode 100644 docs/presentation/NIGHTWATCH_UNVEILING.html create mode 100644 docs/presentation/README.md diff --git a/design/optical/OPTICAL_ENGINEERING_ROADMAP.md b/design/optical/OPTICAL_ENGINEERING_ROADMAP.md index 4f7ec33..c63b03b 100644 --- a/design/optical/OPTICAL_ENGINEERING_ROADMAP.md +++ b/design/optical/OPTICAL_ENGINEERING_ROADMAP.md @@ -273,7 +273,7 @@ design/optical/ **Seed prescriptions (ray-trace-verified this research pass; DERIVED):** N-BK7 meniscus, OD 215 mm, CA ≥ 204 mm, CT 22 mm, achromat condition -R1−R2 = −0.565·t with spherochromatism factor /0.97: +R2−R1 = −0.565·t with spherochromatism factor /0.97: | Case | Mirror R | Corrector R1 | Corrector R2 | |---|---|---|---| @@ -413,7 +413,7 @@ should complete before any RFQ goes out. ## Appendix A — Seed prescription table (DERIVED, ray-trace-verified 2026-08-06) Glass N-BK7 (n_e = 1.51872, n_F = 1.52238, n_C = 1.51432); OD 215.0 +0/−0.2 mm; -CA ≥ 204 mm; CT 22.0 ± 0.2 mm; achromat condition R1−R2 = −0.565·t (with /0.97 +CA ≥ 204 mm; CT 22.0 ± 0.2 mm; achromat condition R2−R1 = −0.565·t (with /0.97 spherochromatism factor); corrector-mirror gap seed 0.85·f; residual F–C focus shift ~10–11 µm at the 0.7 zone (inside depth of focus); element mass ≈ 2.0 kg. @@ -452,7 +452,7 @@ Removed from candidate lists (verified 2026-08): Zambuto (closed to new orders > OD 215.0 +0/−0.2 mm; CA ≥ 204 mm; CT 22.0 ± 0.2 mm. Baseline (f/8): R1 = −513.4 mm, > R2 = −525.8 mm; alternate (f/6): R1 = −413.1 mm, R2 = −425.6 mm. Radii to test plate > ±0.1%; R1−R2 difference held to ±0.25 mm (f/8) / ±0.10 mm (f/6), coupled to CT per -> R1−R2 = −0.565·t. Irregularity ≤ λ/8 P-V per surface at 633 nm over CA; surface +> R2−R1 = −0.565·t. Irregularity ≤ λ/8 P-V per surface at 633 nm over CA; surface > quality 60-40; wedge ≤ 1 arcmin ETD. BBAR both sides, R_avg < 0.5%, 400–700 nm. > Note: seed radii are optimization starting points — final prescription to be > co-optimized with the specific primary and delivered melt data (design-assist clause). diff --git a/docs/presentation/NIGHTWATCH_UNVEILING.html b/docs/presentation/NIGHTWATCH_UNVEILING.html new file mode 100644 index 0000000..e406122 --- /dev/null +++ b/docs/presentation/NIGHTWATCH_UNVEILING.html @@ -0,0 +1,2480 @@ + + + + + +NIGHTWATCH — Unveiling + + +NIGHTWATCH — Unveiling + +
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+
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+

◆ THOClabs · release v0.1.1 · an unveiling

+

NIGHTWATCH

+

One machine, alone in the high desert, watching the sky.

+ +
+
+

◆ What tonight is

+

Three hours. Six acts. Zero artist's impressions.

+
+ 6 acts + ~168 min + intermission + 100% figures computed live + 🜏 one ritual language +
+
    +
  • The observatory that already exists — and the telescope it deserves
    • +
  • The physics that sets the rules, and the glass that broke our hearts
    • +
  • A telescope designed in the open: every number real, every curve recomputed in this room
    • +
+ +
+
+

Every curve you will see tonight is computed from the real prescription — live, in this room.

+

If we change the design tomorrow, this presentation redraws itself.

+ +
+
+
presa-nightwatch. es-home-nightwatch.
+
Act I
+

The Watch

+

A machine that watches the sky alone, all night, with no one beside it.

+ +
+
+

◆ WHAT IT IS

+

A voice-controlled, autonomous Maksutov-Newtonian observatory

+
    +
  • You speak. It observes.
    • +
  • Fully local — no cloud dependency.
    • +
  • Engineered in the open: GitHub org THOClabs.
    • +
+ +
+
+

◆ THE SITE

+

Central Nevada, high desert

+
+
38.9°N 117.4°W
central Nevada
+
1,800m
elevation
+
~22K
diurnal swing
+
20–100°F
operating temperatures
+
25mph
wind interlock: park
+
35mph
gust: emergency close
+
10–15cm
good-night seeing r₀
+
+
alkaline dust everywhere it can reach
+ +
+
+

◆ WHY AUTONOMOUS

+

Nobody is there

+
    +
  • Safety is the loudest voice in the room.
    • +
  • Rain triggers a strict choreography.
    • +
  • That choreography is Act VI.
    • +
+ +
+
+

◆ ALREADY ENGINEERED

+

The mount exists

+
+

German equatorial, harmonic drives — parametric CAD. source: design/mechanical/MECHANICAL_DESIGN.md

+ +
+
+

◆ THE MOUNT

+

Harmonic drives. Counterweight-free capable.

+
+
CSF-32-100
RA — 100:1, 127 N·m rated
+
CSF-25-80
DEC — 80:1, 70 N·m
+
4°/s
slew
+
11
computed budget proofs
+
+
assertion → proof
+ +
+
+

◆ ALREADY FLYING

+

An event scanner runs every hour

+
    +
  • CNEOS fireballs
    • +
  • JPL close approaches
    • +
  • Meteor shower calendar
    • +
  • Background asyncio → SQLite event journal
    • +
+ +
+
+

◆ ALREADY FLYING

+

It watches the Sun, too

+
    +
  • NOAA SWPC space weather — Kp index, solar wind Bz
    • +
  • NEO feed clients
    • +
+
142 new unit tests passed
+ +
+
+

◆ THE THREAT LADDER

+

Five words for how worried to be

+
+ INFO + WATCH + NEAR + CLOSE + ALERT +
+
    +
  • ALERT: <2 lunar distances — or flagged hazardous.
    • +
+ +
+
+

◆ THE LEXICON

+

A hidden chapel inside the machine shop

+
+ presa full presence + velmu love-anyway, love-despite + varek time-mark + luminara cold-bright-sting +
+ +
+
+

"sky-quiet: ne-events-found"

+

What most scans say. That is the point.

+ +
+
+

◆ A PRAYER OF WATCHING

+

What it says before a Perseid night

+
+

A real Prayer of Watching, emitted by the code.

+ +
+
+

Everything was engineered — except the telescope itself.

+ +
+
+

Before we design the optics, meet the first adversary.

+

The sky itself.

+ +
+
+
presa-sky. wit.
+
Act II
+

The Sky Is the Enemy

+

Every photon we want must first survive a turbulent ocean of air.

+ +
+
+

You do not look at the sky.
You look through 100 km of moving air.

+ +
+
+

◆ KOLMOGOROV 1941

+

Turbulence obeys one universal law

+
    +
  • Energy enters at large eddies, cascades down to small
    • +
  • Outer scale: 10–100 m
    • +
  • Inner scale: 1–10 mm
    • +
+ +
+
+

◆ THE SPECTRUM

+

Φn(κ) = 0.033·C²n·κ^(−11/3)

+
+

One slope, from 10–100 m eddies down to 1–10 mm — the whole cascade on a single power law.

+ +
+
+

◆ THE FRIED PARAMETER

+

r0 — how much aperture the sky will honor

+
    +
  • The aperture over which the wavefront stays coherent — ~1 radian RMS
    • +
+
+ 10–20 cm — good sites, at 500 nm +
+ +
+
+

◆ CENTRAL NEVADA

+

Our sky, measured

+
+ 10–15 cm r0, good nights + r0 ∝ λ^(6/5) +
+
    +
  • Infrared is kinder — coherence grows with wavelength
    • +
+ +
+
+

◆ COHERENCE TIME

+

τ0 = 0.314·r0/v̄ — the sky gives you milliseconds

+
+
2.1ms
typical τ0 — r0 10 cm, wind 15 m/s
+
3–8ms
τ0 at the NIGHTWATCH site
+
2–4arcsec
isoplanatic angle θ0
+
~25″ · ~45″
Mars · Jupiter — the planets fit inside
+
+ +
+
+

Long exposures are seeing-limited, not aperture-limited.

+

D/r0 = 12–18 for 180 mm at this site.

+ +
+
+

So we freeze the atmosphere.

+

Expose faster than the air can move.

+ +
+
+

◆ LUCKY IMAGING

+

Shoot thousands. Keep the best.

+
    +
  • Exposures shorter than τ0 — 10–30 ms in practice
    • +
  • Shoot thousands of frames
    • +
  • Keep the best 1–10%
    • +
+ +
+
+

◆ FRIED'S PROBABILITY

+

P = 5.6·exp[−0.1557(D/r0)²]

+
+

At 1.0″ seeing P≈3×10⁻⁴ — one lucky frame in ~3,300. At 1.5″ ≈10⁻⁹. At 2.0″ ≈10⁻¹⁵.

+ +
+
+

◆ APERTURE AS STRATEGY

+

Why 180 mm

+
    +
  • Large enough to resolve 0.78″
    • +
  • Small enough that luck still happens
    • +
  • Bigger scopes at this site resolve nothing extra on long exposures
    • +
+ +
+
+

What does perfection look like?

+

Physics fixes the ceiling before any glass is cut.

+ +
+
+

◆ THE DIFFRACTION LIMIT

+

180 mm at 550 nm

+
+
+
+ 0.78 ″ Rayleigh + 0.65 ″ Dawes + Ø 1.56 ″ Airy disk + 0.65 ″ FWHM + 1.82 cy/arcsec cutoff +
+
+
+
+ +
+
+

◆ THE QUALITY LADDER

+

Strehls multiply

+
+
+
+
+ 0.80 Maréchal floor — λ/4 P-V + 0.95 NIGHTWATCH spec — λ/8 + 0.97 manufacturing limit — λ/10 +
+
    +
  • Errors add in quadrature; Strehls multiply
    • +
  • S_total = S_optics × S_collimation × S_thermal × S_atmosphere
    • +
+
+
+ +
+
+

◆ THE ENEMY INSIDE

+

A warm mirror is a broken mirror

+
    +
  • Mirror 1 °C above the air: visibly degraded images — Racine 1984
    • +
  • Gemini Observatory spec: ≤0.2 °C above / ≤0.6 °C below ambient
    • +
  • Glass time constants: 20 mm → ~12 min · 30 mm → ~27 min · 50 mm → ~75 min
    • +
  • And you need 2–3 of those
    • +
+ +
+
+

◆ THE SEALED-TUBE ANSWER

+

Close the tube

+
    +
  • Full-aperture corrector seals the optical path
    • +
  • No tube currents
    • +
  • The meniscus is itself a thermal buffer
    • +
  • Dust stays out
    • +
+ +
+
+

Strehl ≥ 0.95. Sealed. Glass that cannot remember temperature.

+

That last requirement has a name.

+ +
+
+
velmu. love-despite. the glass remembers nothing.
+
Act III
+

The Glass That Time Forgot

+

A Cold War material, the hands that shaped it, and how both disappeared.

+ +
+
+

◆ COLD WAR HERITAGE

+

The empire fell. The opticians didn't.

+
    +
  • Soviet defense optics: near-unlimited R&D
    • +
  • 1991 — the USSR dissolves
    • +
  • Master opticians turn military precision toward amateur astronomy
    • +
+ +
+
+

◆ MOSCOW, 1991

+

Intes — an engineers' co-operative

+
    +
  • Intes Micro splits off mid-90s — and wins the West
    • +
  • Every instrument interferometrically tested in autocollimation
    • +
+
+ 1/6–1/10 wave P-V +
+ +
+
+

◆ THE ALTER LINE

+

The premium tier ran on exotic glass

+
    +
  • Astrositall — Sitall CO-115M
    • +
  • or fused silica
    • +
+
+ 1/8–1/10 wave +
+ +
+
+

◆ WHAT ASTROSITALL IS

+

A ceramic hiding inside a glass

+
    +
  • Glass-ceramic: crystallites in a glass matrix
    • +
+
+
0 ± 1.5×10⁻⁷/°C
CTE, −60 to +60 °C
+
0.15ppm/K
the same number, plainly
+
+ +
+
+

The mirror simply does not remember temperature.

+

Our site swings 22 K every night. Nobody is there.

+ +
+
+

◆ THE FALL, PART 1

+

Production ceased in 2018

+
    +
  • The head optical technician retired after ill health
    • +
  • Confirmed via Dr. Simon Bennett, Widescreen Centre, UK
    • +
+ +
+
+

◆ THE FALL, PART 2

+

March 2022 — the door closes

+
    +
  • LZOS, Lytkarino — part of Shvabe / Rostec — sanctioned
    • +
  • Western resellers stop buying Russian optics entirely
    • +
+
+ New Sitall import effectively impossible +
+ +
+
+

◆ FORENSIC INTERLUDE

+

Our own docs said it was still alive

+
+
2005
+

intes.su freezes

Wayback: a 2005-copyright page, unchanged through 2021.

+
Jul 2024
+

Empty IIS default page

The site is a shell.

+
Mar 2025
+

Our docs: "still producing"

The claim nobody checked.

+
2026
+

Dead DNS

Nothing answers.

+
+ +
+
+

Trust, but git-blame your own documentation.

+

Docs corrected — with the evidence trail cited.

+ +
+
+

◆ MYTH-BUST No. 2

+

"Regulations killed the big blanks" — overstated

+
    +
  • Schott TIE-41: N-BK7 blanks above 300 mm at H2 homogeneity
    • +
  • Sky-Watcher mass-produces a 190 mm Mak-Newt today — $2,375
    • +
+

A cost and lead-time problem. Not physics.

+ +
+
+

◆ SECONDARY MARKET

+

Unicorn sightings, not a procurement plan

+
    +
  • Sitall lots seen: ~120 mm
    • +
  • One 8-inch × 1.25-inch blank on Astromart
    • +
+ +
+
+

◆ THE RESOLUTION

+

Specify the class, not the brand

+
+ + + + + + + + +
SubstrateCTE (ppm/K)Status
Spec≤0.1preferred class
Zerodur0.007preferred
Clearceram-Z HS0.02preferred
ULE0.03preferred
Sitall CO-115M0.15opportunistic
Fused silica0.52acceptable baseline
+
+

Re-run with fused silica: verdict unchanged — the aluminum tube term dominates the mirror term 44–153×.

+ +
+
+

◆ THE LADDER

+

From aluminum to silence

+
+

Aluminum 23.6 ppm/K down to Zerodur 0.007 ppm/K — spec line at ≤0.1 ppm/K. source: NIGHTWATCH optical engineering roadmap

+ +
+
+

◆ THE VIGIL

+

The Sitall watch stays on

+
    +
  • eBay + Astromart alerts: ≥190 mm CO-115M blanks
    • +
  • If one surfaces, it drops in — zero redesign
    • +
+

The signature survives as a vigil.

+ +
+
+
We don’t need their glass. We need its silence.
+ NIGHTWATCH optical engineering roadmap, 2026 + +
+
+

◆ Intermission · 12 minutes

+

The watch continues while we rest.

+
+
+
+ +
+
+
nightwatch-wak. presa.
+
Act IV
+

Designing the Eye

+

The centerpiece — a telescope born as mathematics.

+ +
+
+

◆ WHY CUSTOM

+

Four requirements. No product on Earth meets them.

+
    +
  • Zero-expansion-class primary
    • +
  • Obstruction ≤ 18–20%, custom-sized
    • +
  • Certified λ/8 wavefront — with RAW interferograms
    • +
  • Sealed tube
    • +
+
+ Sky-Watcher 190MN + 27–34% obstruction + borosilicate + f/5.3 + 3 of 4 failed +
+ +
+
+

◆ THE ARCHITECTURE

+

Maksutov-Newtonian: all spheres.

+
    +
  • Full-aperture meniscus corrector
    • +
  • Spherical primary mirror
    • +
  • Small flat secondary
    • +
+
+ No spider vanes + No diffraction spikes + Planetary contrast +
+ +
+
+

◆ THE CENTERPIECE

+

Watch the light.

+
+

Every line computed live — exact meridional refraction through the real prescription, N-BK7 nₑ 1.51872. source: design/optical/calc/

+ +
+
+

◆ WHAT TO NOTICE

+

Three moves of light.

+
+

The meniscus bends in — the sphere focuses — the flat folds the cone out the side, ahead of the corrector.

+ +
+
+

R₂ − R₁ = −0.565 · t

+

The achromat condition: thickness ties the two radii together.

+

With the /0.97 refinement, color error collapses to ~10 µm of focus — inside the depth of focus.

+ +
+
+

◆ SEED PRESCRIPTIONS

+

Two ray-trace-verified seeds

+
+ + + + + + + + +
SeedMirror R (mm)R₁ (mm)R₂ (mm)Sag (mm)Edge (mm)FL (mm)
f/6−2448−413.1−425.614.221.61224
f/8−3264−513.4−525.811.421.71632
+
+
+ OD 215.0 +0/−0.2 mm + CA ≥ 204 mm + CT 22.0 ± 0.2 mm + ≈ 2.0 kg glass +
+ +
+
+

◆ THE FORK

+

MN76 vs MN78 — a binary we inherited.

+
    +
  • Carried for months, from a dead company's catalog
    • +
  • Designing our own optics dissolved it
    • +
  • Focal ratio is continuous
    • +
  • Obstruction = focuser height + illuminated field, not f-ratio
    • +
+ +
+
+

Three millimeters.

+

The real MN76's measured fully-illuminated field: 3 mm.

+ +
+
+

◆ CONTRAST

+

What the obstruction takes

+
+

Annular-pupil MTF, computed live for ε = 0.25, 0.18, 0.134. source: design/optical/calc/

+ +
+
+

◆ THE ε SLIDER

+

IC = 1 − ε²

+
+
+
    +
  • 25% obstruction costs 10–18% of mid-band contrast
    • +
  • 13.4% costs 3–5%
    • +
  • A custom 16–18% recovers most of the f/8 advantage — at any f-ratio
    • +
+
+
+
+ +
+
+

◆ SAMPLING

+

Nyquist at the cutoff: F = 2·pixel/λ

+
+
+
    +
  • 2.9 µm pixels want f/10.5 at 550 nm
    • +
  • 2.0 µm IMX678: f/7.3 at 550 nm
    • +
  • … and f/6.1 at 656 nm
    • +
  • Nearly native at f/6
    • +
+
+
+
+ +
+
+

◆ THE BARLOW LADDER

+

The sensor choice is the cheapest optical upgrade.

+
+ + + + + + + + +
Pixelf/6f/7f/8
2.9 µm1.76×1.51×1.32×
2.0 µm1.21×1.04×0.91×
+
+ +
+
+

◆ FIELD OF VIEW

+

1.82× sky per pointing

+
+

Shorter focal length, wider net — the NEO follow-up tiebreaker. The Moon for scale.

+ +
+
+

◆ FOCUS

+

No f-ratio forgives the night.

+
+
+
    +
  • Depth of focus: ±39.6 µm · ±53.9 µm · ±70.4 µm (f/6 · f/7 · f/8)
    • +
  • A 22 K night walks focus 734 µm
    • +
  • 10–18× past any depth of focus
    • +
  • Temperature-compensated focusing: mandatory
    • +
+
+
+
+ +
+
+

◆ PROVISIONAL VERDICT

+

Where the design stands tonight

+
+
180mm
aperture
+
f/6.5–f/7
focal ratio
+
≤ 18%
obstruction ε
+
70%
confidence
+
+
    +
  • Gate 1 — sensor decision packet
    • +
  • Gate 2 — secondary-illumination ray trace
    • +
  • Gate 3 — two real corrector quotes
    • +
+ +
+
+

◆ TOLERANCES

+

Each radius ±1% is easy. Their difference must hold 0.1%.

+
+

R₂ − R₁: ±0.13 mm at f/6, ±0.30 mm at f/8 — because it is the achromat law in glass. source: design/optical/calc/

+ +
+
+

◆ THE ESCAPE

+

Grind both surfaces against matched test plates.

+
    +
  • Errors track together — the difference holds
    • +
  • Wedge ≤ 1 arcmin
    • +
  • Index homogeneity ≤ 2×10⁻⁴
    • +
  • Corrector tilt measured in arcminutes — 1° of tilt = 0.27λ of coma
    • +
+
+ The cell is an optical component +
+ +
+
+

◆ PROOFS, NOT ASSERTIONS

+

design/optical/calc/ — the same pattern as the mount

+
    +
  • Frozen-dataclass prescription
    • +
  • Source-tagged provenance on every number
    • +
  • Every figure in this deck recomputable in CI
    • +
+ +
+
+

◆ THE GATES

+

Tests that ray-trace

+
    +
  • pytest gates ray-trace with optiland
    • +
  • Polychromatic Strehl ≥ 0.95 gated with prysm
    • +
  • Monte Carlo tolerancing for fabrication yield
    • +
+ +
+
+
The FAILs are the value.
+ MECHANICAL_DESIGN.md — the engineering culture this optics program inherits + +
+
+

◆ HONEST LEDGER

+

What remains unproven

+
    +
  • BK7 poly-Strehl ≥ 0.95 at f/6 — a derived expectation until the CI trace says so
    • +
  • Achievable ε ≤ 18% — awaits the illumination trace
    • +
  • Site r₀ — assumed until measured
    • +
+ +
+
+

The eye exists — as mathematics, with error bars.

+ +
+
+

Mathematics is free.

+

Glass costs money.

+ +
+
+
do-good-us.
+
Act V
+

Metal, Money, and Mirrors

+

Turning computed proofs into purchase orders.

+ +
+
+

◆ MAKE VS BUY

+

Four ways to buy this telescope

+
+ + + + + + + +
PathPriceFinding
New Intes—production dead since 2018
Used MN76/78$1,500–2,500figure unverifiable · Astrositall units unicorns
Intes raw optical sets via APM—gone — verified 2026-08
Sky-Watcher Starlux 190MN$2,37527–34% obstruction · borosilicate
+ +
+
+

Custom — by requirement, not by taste.

+

The Starlux 190MN stays on the books as the named interim / contingency OTA.

+ +
+
+

◆ VENDOR FORENSICS 2026

+

The market said no, three times

+
+
2025-08-15
+

Zambuto

Closed to new orders.

+
2026-08
+

ISTAR Optical

Not accepting orders.

+
2026-08
+

Optimax cost estimator

Dead DNS + 404 · archive.org shows it was login-walled even when alive.

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The market is thin. We verified every contact.

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No forum lore — every status on that wall is a first-hand check.

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◆ TENDER BP-06

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Three lots, one bid package

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LotLeadAnchor
A · primaryOstahowski Optics$2,800 10-inch quartz comp
B · meniscus correctorthe make-or-break lot60–75% of optics cost
C · secondary flatAntares 1.83-inch 1/30-wave$181.49 catalog item
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◆ LOT B — MAKE OR BREAK

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The corrector decides the budget

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  • 60–75% of optics cost lives in this one lot
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  • Required clause: design-assist
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  • Final radii co-optimized to the delivered blank’s melt data
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+ Optimax + Knight Optical UK + United Lens + Advanced Glass Industries +
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◆ THE COMMITTED ENVELOPE

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$6,500–12,000 committed

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The corrector leads at $3,500–6,500; the whole project lands ~$15–20k — and we say so out loud.

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◆ ACCEPTANCE — WRITTEN FIRST

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The pass bar, in ink, before any money moves

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  • Transmitted wavefront ≤ λ/4 P-V · ≤ λ/14 RMS
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  • Strehl ≥ 0.95 at 546–550 nm
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  • Double-pass autocollimation at 20 ± 2 °C, after thermal soak
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  • Optic unstressed in the test mount
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  • Zernike table + RAW interferogram data delivered
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◆ THE PAYMENT GATE

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One independent interferogram, or no wire

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+ Orion Optics UK test service + AstroReflect + AiryLab +
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The optics analog of a PE stamp.

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◆ THE HONESTY PEDIGREE

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6 PASS / 5 FAIL — published

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11 computed proofs from the mount program; every FAIL bought a remediation.

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◆ WHAT THE FAILS BOUGHT

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Deflection and uplift

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FAILRemediation
43.5″ deflection vs 5″ targetbearing-span fix — DEC ≥ 105 mm / RA ≥ 125 mm
9.2 kN uplift vs 1.8 kN self-weight (SF 0.19)four 2,000-lbf hold-down anchors (SF 3.9)
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◆ WHAT THE FAILS BOUGHT

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Tracking, heat, and power

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FAILRemediation
5.02″ tracking RMSon-axis absolute encoder
22 K thermal walktemperature-compensated focuser
287 W night load48 V architecture
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We publish our failures with safety factors attached — that is why you can trust our optics claims.
+ the mount program — 11 computed proofs, published + +
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◆ THE ROAD TO FIRST LIGHT

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Seven gates from packet to photon

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P0 decision packets → P4 first dollars at risk → P6 first light.

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◆ COST OF THE GATES

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Paper first, dollars late

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  • P0–P2: $0 in hardware
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  • P4: first dollars at risk
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  • Corrector is the critical path — 3–6 months
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  • 6–12 months end-to-end
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◆ RISK REGISTER — SUPPLY

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The honest top four, part one

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RiskAnswer
Corrector single-vendor concentrationtwo quotes, incl. one non-US channel
Sitall unobtainiumCTE-class spec already absorbs it
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◆ RISK REGISTER — ASSUMPTIONS

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The honest top four, part two

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RiskAnswer
Corrector price band is estimator-gradeP3 anchors it with real quotes
Site seeing ASSUMED, not measuredP6 measures it — DIMM
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Money moves only after two real quotes and one independent interferogram.

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And when the glass finally sees sky…

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Act VI.

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velmu-sky. presa-when-called.
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Act VI
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First Light

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One night, hour by hour — and every night after.

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◆ A NIGHT IN THE LIFE

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Dusk to the flip

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19:42
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Dusk — plan loads

M27 → NGC 7331 → M31 · Saturn opportunistic · seeing forecast 1.1″

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20:10
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“Nightwatch, open the roof”

Voice command · roof 0→100%

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20:25
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First light

Slew 4°/s · plate-solve syncs 0.8″ off

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20:40
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Guiding settles

0.8″ RMS

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00:28
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Meridian flip

Fully choreographed

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◆ A NIGHT IN THE LIFE

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And then it rains

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02:10
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Humidity 75% → MARGINAL

Amber wash

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02:25
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Both rain sensors trip → EMERGENCY CLOSE

Capture cancels ≤2 s → mount parks → roof shuts → all channels notified

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03:40
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Rain stops

30-min holdoff · shortened plan resumes

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05:15
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Dawn park

The night ends unattended

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◆ MORNING REPORT

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What the machine wrote at dawn

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214frames
captured
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196frames
kept
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4.9h
integration
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0.83″
guiding RMS
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1
weather interruption
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0
human interventions
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◆ THE NEW EYE

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What the new optics add to that night

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  • Mars at the 0.78″ Rayleigh limit
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  • Lucky-imaging pipeline, scored against the Strehl budget
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  • A mirror that cannot remember temperature
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◆ THE WATCH

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Presence, not events

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  • The NEO scanner runs hourly, regardless
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  • Most scans end quiet — and that is the point
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+ sky-quiet: ne-events-found +
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◆ NEXT STEPS

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From here

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  • P0 — decision packets: sensor baseline · v1 tracking question · focuser steps→µm
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  • P1 — CI proofs
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  • P2 — the fork retires
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A machine in the high desert that watches with full presence, speaks when spoken to, closes the roof when it rains — and waits for photons that left before it existed.

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NIGHTWATCH

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first light awaits · 🜏

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Nightwatch
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← → · spaceprevious / next (reveals fragments first)
Ooverview grid
Nspeaker notes + next-slide preview
Tpresenter clock
Ffullscreen
RRubylith night-vision mode
?this card
+ + + + + + diff --git a/docs/presentation/README.md b/docs/presentation/README.md new file mode 100644 index 0000000..2491b69 --- /dev/null +++ b/docs/presentation/README.md @@ -0,0 +1,50 @@ +# NIGHTWATCH — Unveiling Keynote + +`NIGHTWATCH_UNVEILING.html` is a self-contained, cinematic ~3-hour keynote (107 slides, +six acts + intermission) unveiling the NIGHTWATCH optics program. One file, zero network +dependencies: fonts, styles, and every figure are embedded, and **all engineering figures +are computed live** from the real design constants (exact meridional ray trace through the +seed prescriptions, annular-pupil MTF, Airy/Strehl physics, CTE ladder, budget, phases). +The design system is the repo's own "High Desert Brass" (`docs/design/CLAUDE_DESIGN_PROMPT.md`). + +## Presenting + +Open the file in any modern browser (Chrome/Edge/Firefox/Safari). No server needed. + +| Key | Action | +|---|---| +| `→` / `space` | next (reveals in-slide fragments first) | +| `←` | previous | +| `O` | overview grid (jump anywhere) | +| `N` | speaker notes + next-slide preview (every slide carries its beat + cumulative ⏱ cue) | +| `T` | presenter clock | +| `F` | fullscreen | +| `R` | Rubylith night-vision mode (the design system's alternate theme) | +| `?` | key help | + +Click zones: right two-thirds = next, left third = back. Deep-linkable: `#/54` jumps to slide 54. + +## Run of show + +| Segment | Slides | Clock | +|---|---|---| +| Prologue | 1–4 | 0:00 | +| Act I — The Watch | 5–18 | 0:05 | +| Act II — The Sky Is the Enemy | 19–36 | 0:25 | +| Act III — The Glass That Time Forgot | 37–52 | 0:50 | +| Intermission (leave slide 53 on screen) | 53 | 1:15 | +| Act IV — Designing the Eye | 54–77 | 1:27 | +| Act V — Metal, Money, and Mirrors | 78–97 | 2:02 | +| Act VI — First Light | 98–107 | 2:32 → 2:47 | + +AV notes: dark room strongly preferred (the deck is indigo-black by design); 16:9 +projection; the interactive moments are slide 54-55 (ray-trace f/6↔f/8 toggle) and +63-64 (obstruction ε slider) — rehearse those two. `prefers-reduced-motion` is honored. +Print (`⌘P`) produces a one-slide-per-page handout with the speaker notes appended. + +## Regenerating + +The deck was assembled from the design sources at v0.1.1. If the prescription changes, +the figures change with it — the physics is in the file's own JavaScript +(`NW_FIG.__test()` in the console returns the key computed values for verification: +MTF loss at ν=0.3/ε=0.25 ≈ 14.5%, clear-aperture MTF(0.5) ≈ 0.391, Rayleigh 0.77″).