Rapid bidirectional transmission distribution function measurement device

A technology of distribution function and measurement device, applied in the field of bidirectional transmission distribution function rapid measurement device, can solve problems such as measurement angle limitation, and achieve the effects of rapid measurement, good measurement accuracy, and reduced measurement time

Active Publication Date: 2019-12-20
HENAN NORMAL UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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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  • Rapid bidirectional transmission distribution function measurement device

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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 rapid bidirectional transmission distribution function measurement device. The rapid bidirectional transmission distribution function measurement device comprises a light source; a sample is arranged below the light source along the light transmission direction; a semi-parabolic reflector is arranged below the sample; the axial section of the semi-parabolic reflector andthe surface of the sample are superposed; furthermore, the focal point of the semi-parabolic reflector is on the surface of the sample; a first off-axis parabolic reflector is arranged at the left side of the semi-parabolic reflector along the light transmission direction; a diaphragm is arranged at the focal point position of the first off-axis parabolic reflector; a second off-axis parabolic reflector is arranged below the diaphragm along the light transmission direction; the focal point of the second off-axis parabolic reflector and the focal point of the first off-axis parabolic reflectorare superposed; and a photoelectric detector is arranged at the left side of the second off-axis parabolic reflector along the light transmission direction. According to the device in the invention, with the help of the special optical property of a parabolic mirror, rapid measurement of a bidirectional transmission distribution function can be realized; compared with the existing device, the measurement time can be greatly reduced; furthermore, the measurement accuracy is good; and the device is suitable for measuring multiple 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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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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