Lens
part · 1280 · Middle Ages
A transparent body that focuses light by refraction.
Principles and materials it uses
- Refraction of light — uses. A lens focuses light by refraction.
- Glass — is made of. Lenses are ground from glass.
Where it is used
- Smartphone camera — is part of. A lens of several elements focuses the image.
- Camera — is part of. A camera’s lens.
- Sextant — is part of. The sextant’s telescope.
- Photolithography — is used in. Projection optics.
- Photocopier — is part of. Optics.
- Digital camera — is part of. A lens.
- Cinématographe — is part of. A lens.
- Film projector — is part of. A projection lens.
- Magic lantern — is part of. Lenses.
- Optical telegraph — is used in. Signals were read through telescopes.
- Glasses — is part of. Lenses.
- Microscope — is part of. An objective and an eyepiece.
- Telescope — is part of. An objective and an eyepiece.
- Spectroscope — is part of. A collimator.
- Binoculars — is part of. Objectives and eyepieces.
- Endoscope — is part of. Optics.
- Night-vision device — is part of. Optics.
- VR headset — is part of. Lenses.
- Stereoscope — is part of. Lenses.
- Digital projector — is part of. A lens.
- Ophthalmoscope — is part of. Lenses.
- Otoscope — is part of. A lens.
- Lens replacement — is used in. An artificial lens is a lens.
- Theodolite — is part of. A telescope.
- Planetarium — is part of. Projectors.
- Operating microscope — is part of. Lenses provide the magnification.
- Magnifying glass — is part of. A converging lens.
What it is a kind of
- Contact lens — includes. A lens.
- Magnifying glass — includes. A single lens.