The method of making the filter
A technology of optical filter and white glass, which is applied in the direction of optical filter, vacuum evaporation coating, coating, etc., and can solve the problem of only 0.21mm, poor temperature resistance and film density, and optical filter imaging Poor quality and other problems, to achieve the effect of solving black spots, stable performance, and increased density
Active Publication Date: 2019-10-15
XINYANG SUNNY OPTICAL CO LTD
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Problems solved by technology
The optical filter prepared by this method has poor imaging quality, low brightness, and poor temperature resistance and film density
[0004] At present, with the rapid development of mobile communication, the mobile phone market is also developing rapidly. As the main component of the mobile phone camera module, the demand for UV-IRcut color filters is also increasing. In order to improve the imaging quality of the module, the mainstream use of blue Glass color filter, but due to the low strength of blue glass itself, the thickness can only be about 0.21mm
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[0027] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.
[0028] When describing embodiments of the present invention, the terms "portrait", "landscape", "top", "bottom", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship expressed by "horizontal", "top", "bottom", "inside" and "outside" is based on the orientation or positional relationship shown in the relevant drawings, which are only for the convenience of describing the present invention and simplifying the description, and It is not intended to indicate or imply that the referred device or element mu...
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Abstract
The invention relates to a method of preparing an optical filter. The method comprises steps that (1) an ultrasonic cleaning technology is adopted to clean a piece of white glass; (b) coating equipment is adopted to carry out the pre-cleaning of the white glass; (c) an infrared cut-off filter layer is coated on one surface of the white glass; (d) organic matter is coated on the other surface of the white glass in a spun way to form a spin-coating layer; (e) an antireflection film layer is coated on the spin-coating layer; the thickness of the infrared cut-off filter layer is in a range from 400nm to 680nm, and reflectivity is smaller than 2%. The optical filter prepared by adopting the method has better temperature-resistant performance and better film compactness, and the spin-coating layer has no dark spots, and the structure of the optical filter is more stable.
Description
technical field [0001] The present invention relates to a method for preparing an optical filter. Background technique [0002] Chinese patent 201610305348.0 discloses a hybrid absorption infrared cut-off filter and a preparation method thereof. The hybrid absorption infrared cut-off filter comprises a glass substrate, a coating adhesive layer disposed on the upper surface of the glass substrate, an anti-reflection film layer disposed on the coating adhesive layer, and an infrared cut-off film layer disposed on the lower surface of the glass substrate . There is only one layer of coating glue layer in the optical filter, and in the plating process, the glue layer is first coated and then the infrared cut-off film layer and the anti-reflection film layer are plated. The method for preparing the hybrid absorption infrared cut-off filter is to first perform ultrasonic cleaning on the glass substrate, then use a glue dispenser to perform spin coating, and then use nitrogen gas...
Claims
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IPC IPC(8): G02B5/20G02B1/11C23C14/32C23C14/08C23C14/10
Inventor 杨伟丁维红肖念恭
Owner XINYANG SUNNY OPTICAL CO LTD