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A laser profilometer optical system

A technology of laser profiler and optical system, which is applied in the field of laser profiler, can solve the problems of high cost of use and difficulty in assembly and debugging, and achieve the effect of reducing manufacturing cost

Pending Publication Date: 2019-12-10
合肥嘉东光学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the optical systems of laser profilers on the market adopt the design that the object plane and the image plane are parallel to each other. In order to obtain a large depth of field, more than 6 glass lenses are usually required to meet the requirements of use, which makes assembly and debugging difficult and costly. high

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  • A laser profilometer optical system
  • A laser profilometer optical system
  • A laser profilometer optical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A laser profiler optical system, such as figure 1 As shown, it includes an object plane OBJ, an image plane IMG, and a glass lens arranged between the object plane OBJ and the image plane IMG, and the object plane OBJ and the image plane IMG form a certain angle. The object plane forms an angle of 30° with the optical axis, and the image plane forms an angle of 52.5° with the optical axis.

[0019] The glass lens is followed by a front lens group, a stop ST and a rear lens group along the light incident direction; the front lens group is composed of three meniscus lenses, which are respectively the first meniscus lens g1 and the second meniscus lens g2 and the third meniscus lens g3; the rear lens group is composed of three meniscus lenses, which are respectively the fourth meniscus lens g4, the fifth meniscus lens g5, and the sixth meniscus lens g6. The air space between the meniscus lenses is adjusted according to the imaging requirements. The relevant parameters of...

Embodiment 2

[0025] Compared with Embodiment 1, one meniscus lens located in the rear lens group is reduced, and the parameters of each meniscus lens are redesigned, so that the optical system can meet the required imaging within a large range of oblique angles of the object plane.

[0026] The glass lens is followed by a front lens group, a stop ST and a rear lens group along the light incident direction; the front lens group is composed of three meniscus lenses, which are respectively the first meniscus lens g1 and the second meniscus lens g2 and the third meniscus lens g3; the rear lens group adopts three meniscus lenses, which are the fourth meniscus lens g4 and the fifth meniscus lens g5, such as image 3 shown. The air space between the meniscus lenses is adjusted according to the imaging requirements. The relevant parameters of the five meniscus lenses are shown in Table 2.

[0027] In this embodiment, the object plane forms an angle of 30° with the optical axis, and the image pla...

Embodiment 3

[0033] Compared with Embodiment 1, two meniscus lenses located in the rear lens group are reduced, and the parameters of each meniscus lens are redesigned.

[0034] The glass lens is followed by a front lens group, a stop ST and a rear lens group along the light incident direction; the front lens group is composed of three meniscus lenses, which are respectively the first meniscus lens G1 and the second meniscus lens G2 and the third meniscus lens G3; the rear lens group adopts a meniscus lens, which is the fourth meniscus lens G4; the object plane forms an angle of 45° with the optical axis, and the image plane forms a 62° angle with the optical axis Angle, such as Figure 5 shown.

[0035] The air space between the meniscus lenses is adjusted according to the imaging requirements. In this embodiment, the air interval between the first meniscus lens and the second meniscus lens is 1-3mm, and the air space between the second meniscus lens and the third meniscus lens The int...

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Abstract

The invention discloses a laser profilometer optical system which comprises an object plane, an image plane and a glass lens arranged between the object plane and the image plane, and a certain included angle is formed between the object plane and the image plane. The glass lens sequentially comprises a front lens group, a diaphragm and a rear lens group along the incident direction of light, andthe total number of the lenses of the front lens group and the rear lens group is not more than six; by adjusting the number and parameters of the lenses of the front lens group and the rear lens group, the optical performance requirements are met. The object plane and the image plane are obliquely arranged to be matched with the glass lenses, so that the problem that more than six glass lenses are arranged for meeting the depth-of-field requirement is solved, and the manufacturing cost, the assembly cost and the debugging cost of the optical system of the laser profilometer are reduced on thepremise of meeting the optical performance requirement of the laser profilometer.

Description

technical field [0001] The invention relates to the technical field of laser profilers, in particular to an optical system of a laser profiler. Background technique [0002] With the rapid development of modern industrial technology, laser profilers are widely used in the fields of manufacturing, quality inspection, machine vision, medicine and scientific research. The laser profiler is an instrument that uses laser scanning technology to accurately and quickly measure and inspect the outline, two-dimensional size, and two-dimensional displacement of an object. At present, most of the optical systems of laser profilers on the market adopt the design that the object plane and the image plane are parallel to each other. In order to obtain a large depth of field, more than 6 glass lenses are usually required to meet the requirements of use, which makes assembly and debugging difficult and costly. high. Contents of the invention [0003] In view of the above problems, the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G01B11/24G01B11/00G01B11/02
CPCG02B13/0015G01B11/24G01B11/00G01B11/02
Inventor 冯坤亮
Owner 合肥嘉东光学股份有限公司