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Double-telecentric Kohler illumination light path

An illumination optical path, double telecentric technology, applied in optics, optical components, instruments, etc., can solve the problems of high installation and placement accuracy, complex processing, and high cost, and achieve convenient total optical path length, high imaging quality, and number of lenses. less effect

Inactive Publication Date: 2013-05-01
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Kohler lighting effect is good, there are many lenses, the processing is more complicated, and the installation and placement accuracy requirements are high, so there is also the problem of relatively high cost.

Method used

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  • Double-telecentric Kohler illumination light path
  • Double-telecentric Kohler illumination light path
  • Double-telecentric Kohler illumination light path

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Embodiment Construction

[0026] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] refer to figure 1 , the bi-telecentric Kohler illumination optical path of the present invention adopts optical glass, and the existing Kohler illumination is used as the initial structure, and is composed of six lenses arranged coaxially with the center of the light source 1 which are different in mirror shape and radius of curvature. Light mirror light group and condenser light group are composed of two light groups, arranged from left to right: light source 1, first meniscus lens 2, second meniscus lens 3, third concave lens 4, fourth convex lens 5. The fifth convex lens 7, the sixth concave lens 8, a diaphragm 6 is arranged between the fourth convex lens 5 and the fifth convex lens 7, and the light source 1 projects the light beam to infinity after passing through the above-mentioned lens system.

[0028] The light-...

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Abstract

The invention discloses a double-telecentric Kohler illumination light path, which comprises a light source and lenses, wherein the light path consists of two light groups including a light gathering mirror light group and a light collecting mirror light group divided by six lenses which are in coaxial arrangement with the center of the light source, the light path is sequentially provided with the light source, the first crescent lens, the second crescent lens, the third concave lens, the fourth convex lens, the fifth convex lens and the sixth concave lens from left to right, a light diaphragm is arranged between the fourth convex lens and the fifth convex lens, and after the light source passes through the lens system, light beams are projected to the infinity part. The double-telecentric Kohler illumination light path has the advantages that the lens number is small, the imaging quality is high, the length of the total light path can be conveniently regulated, the application range is greatly improved, the cost performance is higher, and the structure is simple.

Description

technical field [0001] The invention relates to a novel illumination light path, in particular to a bi-telecentric Kohler illumination light path. Background technique [0002] The illumination light path is an important component of the optical system, and the quality of the light source directly affects the performance of the optical system. Ordinary low-end optical systems use natural light or light bulbs for direct illumination. If they want to meet the requirements of numerical aperture and illumination uniformity, they need to use condenser lenses for enhanced design. [0003] At present, the commonly used lighting systems are critical lighting, oblique lighting, reflective lighting and Kohler lighting. [0004] Critical illumination: refers to an illumination method in which the light source is imaged on the object surface by the illumination system. The characteristic of this illumination is that the light source is imaged on the object to be inspected after passing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B13/22
Inventor 萧泽新廖文哲高兴宇
Owner GUILIN UNIV OF ELECTRONIC TECH
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