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Photochromic translucent material before and after color alteration transmittance detection method

A light-transmitting material and photochromic technology, applied in the field of optics, can solve problems such as unreliable data

Active Publication Date: 2008-08-06
SHANGHAI WEIXING OPTICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible for the color-changing material to fade much longer than this time period, so the data measured by the current method is also unreliable

Method used

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  • Photochromic translucent material before and after color alteration transmittance detection method
  • Photochromic translucent material before and after color alteration transmittance detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] It adopts flat brown PMMA resin lens with hard coating, and the thickness is 1mm. The transmittance of the samples was tested on a Topcon TM-2 spectrophotometer. Using the common method, the tested transmittance before and after the color change are 80.89% and 32.2% respectively. Using this method, the transmittance of a piece of resin lens is first detected to be 80.89%, and the logarithm is 0.09, which is recorded as A1; then the two sheets are superimposed, and the transmittance of the sample is detected to be 74.90%, and the logarithm is 0.1255, Denote it as A2; then superimpose the three pieces, it is detected that the transmittance of the sample is 72.03%, take the logarithm as 0.1425, and record it as A3; then superimpose the four pieces, it is detected that the transmittance of the sample is 69.26%, take the The number is 0.1595, recorded as A 4 ; because A 4 -A 3 =A 3 -A 2 , so T=10 -A =10 -(An-An-1) = 96.16%.

[0034] Also take out a resin lens withou...

Embodiment 2

[0036] It adopts flat brown PMMA resin lens with a thickness of 2mm. The transmittance of the samples was tested on a Topcon TM-2 spectrophotometer. Using a common method, the tested transmittances before and after discoloration are 75.63% and 28.7%, respectively. Using the same method, test the transmittance of 4, 6, 8mm thick resin lenses, respectively: 70.26%, 64.88% and 60.12%. Taking the logarithm of the transmittance, it can also be obtained because A 4 -A 3 =A 3 -A 2 , so T=10 -A =10 -(An-An-1) = 92.46%.

[0037] Also take out a piece of resin lens without discoloration, and use the method of 2 times per second to detect the transmittance after the complete discoloration, and the number of tests is 10 times. Figure 3 is obtained, and the test result is 26.12%.

Embodiment 3

[0039] It adopts flat gray hardened polyurethane resin lens with a thickness of 1mm. The transmittance of the samples was tested on a Topcon TM-2 spectrophotometer. Using a common method, the tested transmittances before and after discoloration are 85.23% and 33.25%, respectively. Using this method, the transmittance of a resin lens is first detected to be 85.23%, and the logarithm is 0.069, which is recorded as A 1 ; Then the two sheets are superimposed, and the transmittance of the sample is detected to be 76.83%, and the logarithm is 0.1144, which is recorded as A 2 ; Then the three pieces are superimposed, and the transmittance of the sample is detected to be 74.71%, and the logarithm is 0.1266, which is recorded as A 3 ; Then the four pieces are superimposed, and the transmittance of the sample is detected to be 72.64%, and the logarithm is 0.1388, which is recorded as A 4 ; because A 4 -A 3 =A 3 -A 2 , so T=10 -A =10 -(An-An-1) = 97.23%.

[0040] Similarly, for...

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Abstract

The invention discloses a detection method for the transmittance of photochromic transparent material before color change, which comprises the following steps of (1) detecting the transmittance Tn of a group of photochromic transparent materials with different thicknesses in the sequence from the thinner to the thicker, wherein n being the detection times, and the thickness difference of two materials with adjacent thicknesses being the same with the thickness of the thinnest material; (2) logarithmizing the transmittance to obtain an absorbance An=Ig Tn; (3) when An-An-1=An-1-An-2, calculating the transmittance of the photochromic transparent material before color change, T=10<-A>=10<-(An-An-1)>. The invention obtains the transmittance of the single photochromic transparent material through establishing the simple model of the absorbance and thickness measurement with high reliability and good reproducibility.

Description

technical field [0001] The invention relates to a method for detecting the transmittance in the field of optics, in particular to a method for detecting the transmittance of a photochromic light-transmitting material before and after discoloration. Background technique [0002] Photochromic light-transmitting material is a light-transmitting material that changes color with the intensity of light. The lower light-transmitting material changes color to reduce the transmittance. Under weak light, the light-transmitting material changes color to a small degree or maintains the original color while the transmittance increases. For example, photochromic sun lenses appear dark when the sunlight is strong, and the transmittance decreases. The special optical characteristic of photochromic lenses is that the color of the lens changes with the intensity of light. The stronger the light, the deeper the color change. In this way, the color-changing lens can absorb ultraviolet rays an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59
Inventor 汪山献松陈国贵林晓华徐云谭晓莉
Owner SHANGHAI WEIXING OPTICAL
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