The Best of Made in Taiwan
Fresnel lenses are flat rather than thick in the center and can be stamped out in a mold. Fresnel lenses are commonly used on spotlights. Lamps equipped with this lens are called Fresnels. Fresnel lenses can be positive or negative. A positive lens is a Fresnel lens with a positive focal length. Negative ...
Aspheric lenses are any lenses whose surface angles and profiles are neither part of a sphere nor part of a cylinder. Conventional or non-aspheric lenses have the same curve across their entire surface, like a ping-pong ball. Aspheric lenses accomplish the same amount of refraction but are flatter and slimmer. Aspheric lenses ...
Cylindrical lenses have at least one surface that is formed like a portion of a cylinder. Cylindrical lenses are used to correct astigmatism in the eye, and, in rangefinders, to produce astigmatism, stretching a point of light into a line. Some styles of cylindrical lenses have antireflective coatings to increase the transmission of light through ...
Like plano-convex lenses, double convex lenses have positive focal lengths and form both real and virtual images. Symmetry is assured by finishing both surfaces with the same tool. Because of symmetry, aberrations including coma, distortion and lateral chromatic aberration almost exactly canceled at unit conjugate radio. Double-convex lenses have ...
1. Fixed iris lens. 2. Fixed-focal manual iris lens. 3. Fixed-focal auto iris lens. 4. Varifocal manual iris lens. 5. Varifocal auto iris lens. 6. Specification: (1) TL-3508AV-1/3" 3.5~8mm manual DC auto iris varifocal lens, F1.4. (2) TL-0615AV-1/3" 6~15mm manual DC auto iris varifocal lens, ...
Achromatic lenses are doublet systems consisting of one crown and one flint element, cemented together along a matching curvature, so that white light coming into the lens is all focused (imaged) at the same point on the other side of the lens. They are designed to minimize spherical and chromatic aberrations for infinite conjugate, visible ...
Micro lenses are small lenses, generally with diameters less than a millimetre (mm) and often as small as 10 micrometres (μm). The small sizes of the lenses mean that a simple design can give good optical quality but sometimes unwanted effects arise due to optical diffraction at the small features.
Micro lenses are small lenses, generally with diameters less than a millimetre (mm) and often as small as 10 micrometres (μm). The small sizes of the lenses mean that a simple design can give good optical quality but sometimes unwanted effects arise due to optical diffraction at the small features.
These lenses have positive focal lengths, converge incident light that form both real images and virtual images. They are widely used in telescopes, collimators, optical transceivers, magnifiers, radiometers and condensers.
These lenses have negative focal lengths, diverge collimated incident light, and form only virtual images which are seen through the lenses. They are often used to expand light beams or increase focal lengths in existing systems.
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