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A fast measuring device for two-way transmission distribution function

A technology of distribution function and measurement device, which is applied in the field of bidirectional transmission distribution function fast measurement device, and can solve the problem of measurement angle limitation and the like

Active Publication Date: 2022-03-01
HENAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The measurement spectrum range is 380-1700μm, the measurement angle range is zenith angle 10-80°, azimuth angle 0-315°, due to the camera has a certain size, the measurement angle is limited to a certain extent

Method used

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  • A fast measuring device for two-way transmission distribution function

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the examples, but the protection scope of the present invention is not limited thereto.

[0022] A two-way transmission distribution function rapid measurement device, comprising a light source 1, a sample 2 is provided below the light source 1 along the light transmission direction, a semi-parabolic reflector 3 is provided below the sample 2, and the axial section of the semi-parabolic reflector 3 is in line with the The surface of the sample 2 coincides, and the focus of the semi-parabolic mirror 3 is located on the surface of the sample 2; the left side of the semi-parabolic mirror 3 is provided with a first off-axis parabolic mirror 4 along the light transmission direction, and the first off-axis parabolic mirror 4 The axial section is parallel to the axial section of the semi-parabolic reflector 3; a stop 5 is provided at the focal point of the first off-axis parabolic reflector 4, and a secon...

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Abstract

The invention discloses a two-way transmission distribution function rapid measurement device, which includes a light source, a sample is arranged under the light source along the light transmission direction, a semi-parabolic reflector is arranged under the sample, and the axial section of the semi-parabolic reflector is in line with the surface of the sample. overlap, and the focus of the semi-parabolic reflector is located on the sample surface; the left side of the semi-parabolic reflector is provided with a first off-axis parabolic reflector along the light transmission direction, and the focal point of the first off-axis parabolic reflector is provided with an aperture. A second off-axis parabolic reflector is arranged below the diaphragm along the light transmission direction, and the focus of the second off-axis parabolic reflector coincides with the focus of the first off-axis parabolic reflector; the left side of the second off-axis parabolic reflector is along the light A photodetector is provided in the transmission direction. The device of the invention realizes the rapid measurement of the bidirectional transmission distribution function by means of the special optical properties of the parabolic mirror, can greatly reduce the measurement time compared with the existing device, has good measurement accuracy, and is suitable for the measurement of various materials.

Description

technical field [0001] The invention belongs to the technical field of material surface property measurement, and in particular relates to a fast measuring device for a bidirectional transmission distribution function. Background technique [0002] Bidirectional transmission distribution function (BTDF for short) is a physical quantity that describes the spectral transmission characteristics of various materials on the basis of geometric optics and radiometrics. It represents the transmission characteristics of materials at any observation angle under different incident angle conditions. [0003] In the field of computer graphics, the bidirectional transmission distribution function is used to describe the transmission characteristics of transparent and translucent object materials. Based on the bidirectional transmission distribution function, the three-dimensional modeling of transparent and translucent objects can be accurately realized. In the field of optical system de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/59
CPCG01N21/59
Inventor 刘彦磊刘玉芳于坤马王杰慧张凯华李龙飞
Owner HENAN NORMAL UNIV
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