Register 13 · Light & optics

Focal point.

Focal point — a reference page in the Light & optics register.

Open the Console See how a record is checked

register 13 · Light & optics· reference mark

01 ·

Promise. atom

The contract this mark binds — derived, not asserted.

Focal point — a reference page in the Light & optics register.

Answers: What is Focal point in the Planisphere corpus library?

02 ·

What this is.

twelve marks · how the spectrum gets generated · same construction · 200×200 · integer geometry · currentColor + brass-deep

Use. where parallel rays converge.

Source. 4 rays converging on a brass dot.

Register. 13 · Light & optics — one of the 17 registers of the PLANiSPHERE corpus library.

03 ·

See it work.

Evidence record you can check — not code you have to trust.

Planisphere measures your tool deployment against Focal point and seals the result into a signed, Merkle-rooted evidence record. The grade recomputes on your own hardware; the model state never crosses the boundary.

See the evidence spine →See how a record is checked

04 ·

The board that carries this.

Related marks, and the surface this one funnels to.

Focal point is a reference mark in the Light & optics register. Read the related buyer-facing product context at /evidence.

Aperture reg 13 · adjustable opening Beam splitter reg 13 · 50/50 diagonal mirror Diffraction grating reg 13 · parallel slits · interference pattern Interferometer reg 13 · two-arm interference

05 ·

Routes here from.

Where this mark is referenced in the Planisphere surface.

About

Any internal link in the Planisphere site that names "Focal point" canonicalises here.

06 ·

Sibling marks. Light & optics

Same register · same construction.

splits white light into bands

triangle + incoming ray + brass spectrum fanning out

biconvex · converges light

biconvex shape + focal point dots on the axis

a single line of light

ray with brass arrowhead

50/50 diagonal mirror

diagonal partial mirror + 2 outgoing rays

single-slit aperture

wall + thin opening + light passing

Diffraction grating

parallel slits · interference pattern

closely spaced lines + brass diffraction orders

Refraction angle

Snell's law at the interface

surface line + incident + refracted rays at angles

angle in equals angle out

flat mirror + incoming + reflected ray

adjustable opening

outer ring + inner hex opening

multi-blade variable aperture

ring + 6 overlapping triangular blades

two-arm interference

T-shape arms + brass interference bands at output

See the record Focal point asks for.

The console shows the evidence; the docs show the endpoints; the briefing shows what the product does and does not claim.

Open the Console Read the Docs Read the capability briefing

API ·

When a regulator asks for proof, hand over records — not assurances.

record the duty · seal the receipt · verify offline

Planisphere records each duty event — an output marked, a disclosure shown, a review made — and seals it into a receipt that verifies offline against our published keys. You send hashes, never content. A record is evidence a third party can check; it is not a certification and not a legal determination.

Open the Console Read the Docs Read the capability briefing

See how a record is checked