Black material and its preparation method and application

A technology of black and transparent materials, applied in the field of black materials, can solve problems such as the inability to meet the requirements of optical imaging systems, and achieve the effect of a wide range of applications

Active Publication Date: 2021-09-21
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a black material and its preparation method and application in order to overcome the problem that the brightness value of the black effect obtained by the prior art is above 6 and cannot meet the requirements of the optical imaging system

Method used

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  • Black material and its preparation method and application

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preparation example Construction

[0025] The second aspect of the present invention provides a method for preparing a black material, comprising: forming a thin film containing alternately laminated high light-absorbing film layers and low-refractive index optical film layers on the surface of a substrate by PVD; wherein, forming the The light absorption coefficient of the material of the high light-absorbing film layer is >1.5, the refractive index of the material forming the low-refractive index optical film layer is <1.75, and the total number of layers of the high-light-absorbing film layer and the low-refractive index optical film layer is at least 4, so The film layer adjacent to the substrate is a high light-absorbing film layer; wherein, the material forming the high light-absorbing film layer is selected from one or more of Fe, Nb, Co, Ni, Zn, Zr and Cd species; the material forming the low refractive index optical film layer is selected from one or more of alumina, silicon dioxide and magnesium fluori...

Embodiment 1

[0044] a. Using Corning 3rd generation glass as the base material, after cleaning with a tank type ultrasonic cleaner, load it on the coating fixture and vacuumize it;

[0045] b. When the vacuum degree is 1×10 -3 Pa, fill the machine with argon gas, turn on the ion source after the gas is stable, and perform ion cleaning on the surface of the substrate and the target material for 15 minutes;

[0046] c. Keep the argon valve open, and then turn on the sputtering power supply of the Nb target with a power of 10kW to obtain the first high light-absorbing film layer with a thickness of 300nm and an absorption coefficient of 2.48;

[0047] d. turn off the sputtering power supply of the Nb target material, open the oxygen gas valve again, set the flow rate of 150sccm, turn on the sputtering power supply of the Si target material afterwards, and the power is 10kW to obtain the first low refractive index optical film layer with a thickness of 48nm, The refractive index is 1.46;

[...

Embodiment 2

[0053] a. Using Corning 3rd generation glass as the base material, after cleaning with a tank type ultrasonic cleaner, load it on the coating fixture and vacuumize it;

[0054] b. When the vacuum degree is 8×10 -3 Pa, fill the machine with argon gas, turn on the ion source after the gas is stable, and perform ion cleaning on the surface of the substrate and the target material for 20 minutes;

[0055] c. Keep the argon valve open, and then turn on the sputtering power supply of the Nb target with a power of 10kW to obtain the first high light-absorbing film layer with a thickness of 4.5nm and an absorption coefficient of 2.48;

[0056] d. turn off the sputtering power supply of the Nb target material, open the oxygen gas valve again, set the flow rate of 150sccm, turn on the sputtering power supply of the Si target material afterwards, and the power is 10kW to obtain the first low refractive index optical film layer with a thickness of 76nm, The refractive index is 1.46;

[...

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Abstract

The invention relates to the field of black materials, and discloses black materials, a preparation method and applications thereof. The black material includes: a base material and a film on the surface of the base material, characterized in that the film includes alternately stacked high light-absorbing film layers and low-refractive index optical film layers, and the light absorption coefficient of the high light-absorbing film layer is >1.5, the refractive index of the low refractive index optical film layer is <1.75, the total number of layers of the high light absorption film layer and the low refractive index optical film layer is at least 4, and the film layer adjacent to the substrate is High light-absorbing film layer; wherein, the high light-absorbing film layer is a layer formed by one or more of Fe, Nb, Co, Ni, Zn, Zr and Cd, and the low refractive index optical film layer is aluminum oxide, A layer formed by one or more of silicon dioxide and magnesium fluoride; the color lightness value L of the film is below 5. The black material can meet the requirements of the optical imaging system.

Description

technical field [0001] The invention relates to the field of black materials, in particular to a black material and its preparation method and application. Background technique [0002] In the field of high-precision optical control and detection, especially in the field of visible light detection and display, it is necessary to shield the influence of stray light, so that there is no reflection inside the system and the effect is completely black. Such as aiming instruments, SLR cameras, reflection / projection test instruments, minimally invasive surgery equipment, etc. At present, the industry usually adopts black material spraying method to complete, but often the reflected light of ordinary black material is not low enough, and the blackness is not black enough. The cost of special materials is too high, and mass production has price limitations. [0003] In addition, in terms of appearance decoration of electronic technology products, black is a commonly used color. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00
CPCG02B5/003
Inventor 李超翟俊锋刘玉阳王继厚马兰
Owner BYD CO LTD
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