Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Heat-resisting shading sheet, manufacturing method thereof, and diaphragm and light quantity adjusting device using the same

A manufacturing method and technology of shading sheets, applied in aperture, chemical instruments and methods, optics, etc., can solve problems such as residue, large thermal deformation, and mutual contact, and achieve the effects of reducing manufacturing costs, improving sliding properties, and improving wear resistance

Inactive Publication Date: 2008-06-04
SUMITOMO METAL MINING CO LTD
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a harsh environment, if the above-mentioned conventional light-shielding sheet is used, deformation, discoloration, etc. will occur, and it is not preferable in terms of durability, and there are problems in practical use.
[0014] In addition, since the shading sheet is thermally deformed in a high-temperature environment above 200°C, even the shading sheet with a fine concave-convex structure on the above-mentioned surface has a large thermal deformation, and the shading sheets are in contact with each other, making it impossible to move at high speed and irregular. The degree of friction increases, leading to deterioration of sliding properties and gloss, etc., and there is a possibility that digital cameras, digital video cameras, and liquid crystal projectors cannot perform their original functions.
[0015] In addition, although the above-mentioned roughening treatment of the base plastic film has the effect of improving the adhesion between the base material and the coating film on the base material and reducing the surface gloss by forming fine unevenness on the base plastic film. However, when using the sandblasting method, since the roughness of the sheet depends on the material, particle size, spray pressure, etc. of the blasting material, although the blasting material with a large particle size can be removed from the surface of the sheet by washing with water or brushing, the particles Small particles with a diameter of less than 1 μm will remain on the sheet even after washing, and cannot be completely removed
If the sprayed material remains, in the high temperature environment where the light-shielding sheet is located, due to the difference in thermal expansion coefficient between the sprayed material and the film such as the metal alloy light-shielding film formed on the sheet, there will be a difference in thermal stress and the film will be detached, and the sprayed material will be released from the sheet. Detached from the upper part, it will have an adverse effect on its surrounding components, resulting in the problem that it cannot perform its original function

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat-resisting shading sheet, manufacturing method thereof, and diaphragm and light quantity adjusting device using the same
  • Heat-resisting shading sheet, manufacturing method thereof, and diaphragm and light quantity adjusting device using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] The metal light-shielding sheet and the metal oxide film were formed using a take-up sputtering device as shown in FIG. 2 . First, a target 10 as a film raw material is set on the cathode of the device provided with the magnetron cathode 9 on the side opposite to the surface of the cooling tank drum 7 . The sheet conveyance section composed of the unwinding roller 4 , the cooling tank roller 7 , the take-up roller 8 and the like is separated from the magnetron cathode 8 by the partition 11 . Then, the cylindrical resin sheet base material 1 is set on the unwinding roll 4 . The surface of the polyimide (PI) sheet was blasted at a predetermined spraying time, spraying pressure, and conveying speed to form fine irregularities with an arithmetic average height Ra of 0.5 μm on both surfaces. The polyimide (PI) sheet is dried by heating to a temperature above 200° C. before sputtering.

[0140] Then, after the inside of the vacuum chamber 6 is evacuated by a vacuum pump 5 s...

Embodiment 2

[0147] A heat-resistant light-shielding sheet was fabricated under exactly the same conditions as in Example 1 except that only the thickness of the metal film was changed to 50 nm.

[0148] The evaluation (optical performance, heat resistance) of the obtained heat-resistant light-shielding sheet was performed by the same method and conditions as Example 1. When carrying out the sputtering of the metal film and the oxide film in the same manner as in Example 1, the surface temperature of the sheet is measured by the quartz glass window of the take-up sputtering device by an infrared radiation thermometer, and the temperature is 180-220° C. Example 1 Equivalent flake temperature.

[0149]As a result, properties such as optical density, reflectance, and gloss were at the same level as those in Example 1. In addition, it was confirmed that the surface resistance value was 120 Ω / □, and the arithmetic average height Ra of the surface was 0.4 μm. In addition, in the adhesive evalu...

Embodiment 3

[0152] A heat-resistant light-shielding sheet was produced under exactly the same conditions as in Example 1 except that only the thickness of the metal film was changed to 150 nm.

[0153] The evaluation (optical performance, heat resistance) of the obtained heat-resistant light-shielding sheet was performed by the same method and conditions as Example 1. When carrying out the sputtering of the metal film and the oxide film in the same manner as in Example 1, the surface temperature of the sheet is measured by the quartz glass window of the take-up sputtering device by an infrared radiation thermometer, and the temperature is 180-220° C. Example 1 Equivalent flake temperature.

[0154] As a result, properties such as optical density, reflectance, and gloss were at the same level as those in Example 1. In addition, it was confirmed that the surface resistance value was 90Ω / □, and the arithmetic average height Ra of the surface was 0.3 μm. In addition, in the adhesive evaluat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
particle diameteraaaaaaaaaa
roughnessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a heat-resistant light-shielding sheet, its manufacturing method, and an aperture or light amount adjusting device using the same. Used for optical instrument parts such as the aperture blades of the aperture device for adjustment, and has excellent light resistance, heat resistance, sliding properties, low gloss, and electrical conductivity. The heat-resistant light-shielding sheet is characterized by comprising a resin sheet substrate (A) having a heat resistance of 200° C. or higher, and Ni with a thickness of 50 nm or more formed by sputtering on one or both surfaces of the resin sheet substrate (A). The metalloid film (B), the Ni-based oxide film (C) with low reflectivity formed by sputtering on the Ni-based metal film (B), and the surface roughness is 0.1-0.7 μm (arithmetic mean height Ra).

Description

technical field [0001] The present invention relates to a heat-resistant light-shielding sheet, a manufacturing method thereof, and a diaphragm or a light amount adjusting device using the same, and more particularly, to shutter blades or diaphragm blades used as apertures and lens shutters of digital cameras, digital video cameras, etc., and projectors. Heat-resistant light-shielding sheet excellent in light-shielding properties, heat resistance, sliding properties, low gloss, and electrical conductivity, used for optical instrument parts such as aperture blades of aperture device for adjusting light intensity, and its manufacturing method, and aperture or light intensity adjustment using the same device. Background technique [0002] At present, the shutter blades and aperture blades of cameras operate and stop in an extremely short time due to the increase in shutter speed, and therefore light weight and high slidability are required. In addition, since they are componen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00C23C14/34C23C14/08C23C14/20G03B9/02G03B9/08
CPCC23C14/205C23C14/0036C23C14/085C23C14/562Y10T428/26Y10T428/24967Y10T428/12826Y10T428/12861Y10T428/12771Y10T428/12944B32B27/28
Inventor 小野胜史阿部能之塚越幸夫
Owner SUMITOMO METAL MINING CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com