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Document Title |
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7529041 |
Optical lens system for taking image
An optical lens system for taking image comprises three lens elements with refractive power, from the object side to the image side: a first lens element with positive refractive power having a...
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7382556 |
Lens module
A lens module ( 800 ) includes a lens barrel ( 20 ), a base ( 10 ), and a temperature compensation module ( 30 ). A first lens ( 201 ) is disposed in the lens barrel. The lens barrel is disposed in...
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7130133 |
Lens having wavelike lens element
A lens that can be used in a digital camera includes in sequence a first lens element ( 20 ), a second lens element ( 30 ) and a third lens element ( 40 ). The first lens element is biconvex, and...
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7064905 |
Imaging lens
The present invention includes, from an object side to an image-plane side: an aperture stop with a predetermined diameter, a first lens with a positive refractive power having a convex surface on...
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6504655 |
Wide converter lens
The object of the present invention is to provide a wide converter lens capable of obtaining an angle of view of about 80° or over and having small appearance of distortion. According to one...
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6141084 |
Imaging lens for copying and copying apparatus
In a three-lens configuration, the first lens is formed into a biconvex lens, the third lens is formed into a positive meniscus lens having a concave surface directed onto the object side, and the...
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5715098 |
Lens system for a head separated type charge coupled device camera
Disclosed is a telephoto-type lens system of a head separated charge coupled device (CCD) camera, which includes a first lens group having a positive focal length, a second lens group having a...
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5596455 |
Fixed-focus triplet projection lens for overhead projectors
A Cooke triplet projection lens for use in overhead projectors comprises two outer positive elements of an ophthalmic crown glass and one inner negative element of a light flint glass. The crown...
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5530595 |
Variable focus color corrected field lens
A variable focus color corrected field lens for accepting rays having a divergence of from 0, wherein the rays are collimated, to a divergence of 10 milliradians full angle and directing the rays...
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4830474 |
Variable magnification optical system
A changeover type variable magnification optical system whose focal length is changed by locating an auxiliary lens on the image side of a master lens assembly. The system satisfies following...
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4828375 |
Lens for scanning devices
It is a lens comprising three elements for a scanning device; the lens is particularly for providing a linear scanning. A beam enters the lens from its front focus by rotating a constant angular...
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4531815 |
Objective lens
An objective lens has a positive first lens disposed at a position most distant from an object surface, a meniscus-shaped second lens disposed on the object side of the first lens and having its...
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4416519 |
Objective for video disks
An objective for video disks comprising a first, second and third lenses in which the first lens is a positive lens, the second lens is a negative lens and the third lens is a positive meniscus...
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4258981 |
Reproducing objective for video disks
A reproducing objective for video disks comprising a first, second and third lenses in which the first lens is a biconvex lens, the second lens is a negative meniscus lens, and the third lens is a...
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4234243 |
Reducing lens system
A reducing lens system consisting of three lens components, having an aperture ratio of F/8 with the capability of providing a good image over the entire image surface, and a vignetting factor of...
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4190324 |
Achromatic objective lens
An achromatic objective lens having an aperture ratio of about 1:12 and a viewing angle of about ±1° for use in an astronomical telescope is disclosed. The lens uses conventionally available...
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4050789 |
Tracking lens system for solar collectors and skylights
A tracking lens system for solar collectors or skylights comprises a first array of condensing lenses, a movable array of diverging lenses, and a second array of condensing lenses. By moving the...
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3912379 |
Three element objective lens having asphoric surfaces on the middle element
A three element objective lens having a front positive biconvex element, a middle negative biconcave element and a rear positive biconvex element. The first and second elements are formed of...
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3584936 |
SYMMETRICAL TRIPLET LENS SYSTEM FOR PHOTOCOPYING APPARATUS
A symmetrical triplet lens system for photocopying apparatus characterized by the use of low cost materials and low cost steps in manufacturing. The two outside lens elements have a like index of...
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3449041 |
TRIPLET-TYPE OBJECTIVE LENS
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3443864 |
TRIPLET-TYPE PROJECTION LENS
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3443863 |
TRIPLET-TYPE OBJECTIVE LENS
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3438697 |
WIDE-ANGLE TRIPLET OBJECTIVE
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3237520 |
Symmetrical three element projection lens system
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3205774 |
Thermally compensated plastic triplet lens
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3194116 |
Triplet objective having a negative element formed of a copolymer of acrylonitrile and styrene
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3176582 |
Three lens photographic objective
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3039359 |
Triplet lens objective assembly
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2956475 |
Wide angle lens attachment
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