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2. Optical glass - Wikipedia

   en.wikipedia.org/wiki/Optical_glass

   Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...

3. Condenser (optics) - Wikipedia

   en.wikipedia.org/wiki/Condenser_(optics)

   As with objective lenses, a condenser lens with a maximum numerical aperture of greater than 0.95 is designed to be used under oil immersion (or, more rarely, under water immersion), with a layer of immersion oil placed in contact with both the slide/coverslip and the lens of the condenser. An oil immersion condenser may typically have NA of up ...

4. Precision glass moulding - Wikipedia

   en.wikipedia.org/wiki/Precision_glass_moulding

   Precision glass moulding is a replicative process that allows the production of high precision optical components from glass without grinding and polishing. The process is also known as ultra-precision glass pressing. It is used to manufacture precision glass lenses for consumer products such as digital cameras, and high-end products like ...

5. Holographic optical element - Wikipedia

   en.wikipedia.org/wiki/Holographic_optical_element

   HOEs differ from other optical devices since they do not bend light with curvature and shape. Instead, they use diffraction principles (the distribution of light as it passes through an aperture) to diffract light waves by reconstructing a new wavefront using a corresponding material profile, making HOEs a type of diffraction optical element (DOE). [1]

6. Category:Lenses - Wikipedia

   en.wikipedia.org/wiki/Category:Lenses

   A compound lens is an array of simple lenses (elements) with a common axis; the use of multiple elements allows more optical aberrations to be corrected than is possible with a single element. Manufactured lenses are made of glass or transparent plastic. Elements which refract electromagnetic radiation outside the visual spectrum are also ...

7. Optics - Wikipedia

   en.wikipedia.org/wiki/Optics

   The optical power of corrective lenses is measured in diopters, a value equal to the reciprocal of the focal length measured in metres; with a positive focal length corresponding to a converging lens and a negative focal length corresponding to a diverging lens. For lenses that correct for astigmatism as well, three numbers are given: one for ...