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Uniform sheet light source

A chip light source, uniform technology, applied in the field of optical detection, can solve the problem of uneven light intensity distribution of the light source

Pending Publication Date: 2020-08-25
叶冠中 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a uniform sheet light source for the problem of inducing uneven distribution of light intensity of the laser sheet light source

Method used

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Embodiment Construction

[0031] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0032] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" an...

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Abstract

The invention relates to a uniform sheet light source. The sub lasers are used for generating and emitting laser beams, the wavelengths of the laser beams are the same, the energy distribution of thecross sections of the laser beams is in a Gaussian type or a quasi-Gaussian type, light outlets of the sub lasers are located in the same plane and arranged at equal intervals, and the connecting lineof the light outlets is perpendicular to the emitting direction of the laser beams. By arranging a plurality of sub lasers, the laser range can be prevented from being limited by the size of an optical system, and a large laser range is formed. The energy distribution of the cross sections of the laser beams emitted by the plurality of sub-lasers is Gaussian type or quasi-Gaussian type, and the laser beams are arranged in the same plane at equal intervals, so that uniform light intensity distribution can be formed in a preset area. A plurality of optical systems are in one-to-one correspondence with the plurality of sub lasers, each optical system is arranged on a light path of a laser beam emitted by the corresponding sub laser and is used for shaping the laser beam to form sub-fanning strip light beams with the same beam expanding angle and thickness, and the sub-fanning strip light beams are superposed in a preset area to form planar laser.

Description

technical field [0001] The present application relates to the technical field of optical detection, in particular to a uniform sheet light source. Background technique [0002] Planar Laser Induced Fluorescence (PLIF) is an optical detection technology widely used in the measurement of scalar fields in fluids. The characteristic scalar field (concentration field, temperature field or pH field) within the range to be measured. [0003] PLIF measurement requires the use of a planar laser as the light source of the induced laser sheet. In traditional technology, a cylindrical mirror is usually used to expand a single laser beam. However, due to the uneven energy distribution of the cross-section of the laser beam itself, the use of cylindrical mirror beam expanders can only expand the laser beam into a sheet light source in space, and cannot change the light intensity distribution. Although the Powell prism can improve the light intensity distribution of the sheet light sourc...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/64G02B27/09H01S3/00
CPCG01N21/01G01N21/6402G02B27/0927G02B27/0955G02B27/0905H01S3/005
Inventor 叶冠中黄真理王鲁海纪红军王延伟
Owner 叶冠中