lens
Let an agent explain lenses and how they work, describe kinds and applications, relay optical principles and standards, and distinguish lenses from mirrors, prisms and the eye lens.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain lenses and how they work, describe kinds and applications, relay optical principles and standards, and distinguish lenses from mirrors, prisms and the eye lens.
A transmissive optical component that focuses or disperses light by refraction, made of glass, plastic or other transparent material with curved surfaces, in forms from simple converging and diverging lenses and thick lenses to compound and aspheric lenses, historical burning glasses, catadioptric systems combining lenses and mirrors, corrective spectacle lenses including Stokes lenses for astigmatism, and compound refractive lenses for X-rays; lenses are fundamental to eyeglasses, cameras, microscopes, telescopes and the eye itself.
What it is for: Focusing and shaping light.
It can be explain principles and kinds; describe applications; relay standards and design; distinguish from related components.
Distinguishing features
Refraction at curved surfaces
Focal length
Aberrations
Ubiquitous applications
What it looks like
A curved transparent disc or element, alone or in barrels and frames.
Physical character
lensmaker equation: 1/f = (n-1)(1/R1 - 1/R2) formula - thin lens
refractive index of crown glass: about 1.52 ratio
How it is recognised
Refracting optical element
Converging, diverging, thick, compound, aspheric, corrective, X-ray lenses
Mirrors reflect; prisms deviate without focusing; the crystalline lens is anatomical
Related models
is a kind of - in registry terms
works by - of light
is characterised by - and aperture
is contrasted with - which reflects
In practice
Families and kinds
simple converging and diverging lenses
thick and compound lenses
aspheric and gradient index lenses
spectacle and contact lenses including Stokes lenses
camera, microscope and telescope objectives
catadioptric lenses
Fresnel lenses and burning glasses
compound refractive lenses for X-rays
Identifiers
ISO 10110 optical drawing standards
Standards and regulation
ISO optics standards for drawings and testing
Medical device rules for spectacle and contact lenses
Laser and radiation safety rules for some applications
Failure modes and hazards
Aberrations and distortion
Fire from focused sunlight
Eye damage from improper corrective lenses
Also called
+9
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.lens-artifact
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand How lenses work.
Science.
Principle
Refraction and focus.
Principle
Principle.
- How do lenses focus light, and what do focal length and the lensmaker equation describe? definition
- Is the component a lens, a mirror, a prism or the eye lens? boundary
Kinds
Kinds.
Kinds
Kinds.
- What kinds of lens exist, from simple to compound, aspheric, catadioptric and X-ray lenses? definition
- Which entry fits the specific kind? action
Design Design and aberrations.
Engineering.
Aberrations
Aberrations.
Aberrations
Aberrations.
- What aberrations affect lenses, and how are they corrected? provenance
- Which entry fits optical aberration? action
Manufacture
Manufacture and standards.
Manufacture
Manufacture.
- How are lenses made and tested, and what standards apply? provenance
- Which references are standard? provenance
Apply Applications.
Application.
Vision
Vision correction.
Vision
Vision.
- How do spectacle and contact lenses correct vision, including astigmatism? provenance
- Is the user asking about their own prescription, which needs an eye care professional? boundary
Instruments
Instruments.
Instruments
Instruments.
- How are lenses used in cameras, microscopes, telescopes and X-ray optics? provenance
- Which sources are cited? provenance
Context History.
Context.
History
History.
History
History.
- How did lenses develop from burning glasses and reading stones to modern optics? provenance
- Which entry fits the history of optics? action
Future
New lens technologies.
Future
Future.
- What are metalenses and liquid lenses, as research reports? provenance
- Which entry fits metalens? action
What the second pass must settle
- Should camera lens and spectacle lens be separate primary entries?
- How should optics standards be linked?
- The registry entry has merged aliases naming specialised lens types; should they be split off?