How to Telecentric lens?

High-magnification high-resolution catadioptric telecentric lens,One-button type measuring instrument

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2 results about "Telecentric lens" patented technology

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A telecentric lens is a compound lens that has its entrance or exit pupil at infinity; in the prior case, this produces an orthographic view of the subject. This means that the chief rays (oblique rays that pass through the center of the aperture stop) are parallel to the optical axis in front of or behind the system, respectively. The simplest way to make a lens telecentric is to put the aperture stop at one of the lens's focal points.

High-magnification high-resolution catadioptric telecentric lens

PendingCN114002830AReduce volumeCamera filtersOptical elementsTarget surfaceOphthalmology

The invention relates to a high-magnification high-resolution catadioptric telecentric lens which comprises a first reflector and a second reflector, wherein a first lens is arranged between an object plane and the first reflector, and a second lens, a third lens and a fourth lens are arranged between the first reflector and the second reflector; a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens are arranged between the second reflector and the image plane, and the first lens is a plano-convex lens protruding towards the image direction; the second lens is a plano-convex lens protruding towards the image direction; the third lens is glued with the fourth lens; the third lens is a biconvex lens; the fourth lens is a plano-concave lens which is concave towards the object direction; the fifth lens is glued with the sixth lens; the fifth lens is a concave plano-concave lens; the sixth lens is a biconvex lens; the seventh lens is glued with the eighth lens; the seventh lens is a biconvex lens; the eighth lens is a biconcave lens; and the ninth lens is a biconcave lens. The maximum magnification is 4 times, the maximum support of the target surface is 30 mm, and NA is greater than 1.5.

Owner:SHENZHEN DAJIAN OPTICS CO LTD

One-button type measuring instrument

PendingCN113048879AQuick checkAccurate measurement accuracyUsing optical meansEngineeringTelecentric lens

The invention discloses a one-button type measuring instrument which comprises a rack, an objective table, a CCD high-definition camera, a light source assembly and a computer system. The rack is fixedly arranged on the back of the objective table, the CCD high-definition camera is installed on the top of the rack, a telecentric lens is installed on the head of the CCD high-definition camera, and the light source assembly comprises an upper light source and a lower light source. The upper light source is installed on the portion, corresponding to the portion below the CCD high-definition camera, of the rack, the lower light source is installed in the objective table, a rectangular frame used for containing products is arranged above the middle of the objective table, a glass table top is arranged above the interior of the rectangular frame, and the computer system is electrically connected with the CCD high-definition camera. The instrument has the characteristics of rapid detection, accurate measurement precision and the like. Compared with a traditional vernier caliper and other traditional conventional measuring tools, the instrument has obvious measuring advantage.

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Owner:昆山世纪三友测量技术有限公司

2 results about "Telecentric lens" patented technology

High-magnification high-resolution catadioptric telecentric lens

One-button type measuring instrument

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