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A technology of optical filters and glass substrates, applied in the field of optical filters, can solve the problems of poor sealing effect, affecting the filtering effect, affecting the sealing effect, etc., and achieve the effect of improving sealing and moisture resistance

Active Publication Date: 2016-06-01
上海兆九光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned filter has many disadvantages: since the sealant 3 is in direct contact with the filter film 11, it is very easy to penetrate radially between the two glass substrates 2 and adhere to the surface of the filter film 11. Blocking occurs on the path, which affects the light aperture of the filter, reduces the filtering efficiency, and affects the filtering effect
The sealant 3 is located between the glass substrate 1 and the support 4, and the gap between the glass substrate 1 and the support 4 is very small, resulting in a very thin filling thickness of the sealant 3, which is easy to break, resulting in contact between the outside air and the filter film It makes it oxidized and invalid, affects the sealing effect, and greatly shortens the service life of the filter. The service life of the existing filter in the market generally does not exceed 1 year
On the other hand, during the process of placing the glass substrate 1 in the support 4, the sealant 3 is easily displaced due to friction, the stability is extremely low, and the sealing effect is poor.
Therefore, it is unreliable to rely only on the sealant 3 to isolate the filter film from air

Method used

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Experimental program
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Embodiment 1

[0029] Such as Figure 2-4 As shown, the novel optical filter includes a bracket 4 and three glass substrates 1, and the three glass substrates 1 are respectively a first glass substrate 1a, a second glass substrate 1b and a third glass substrate 1c. The glass substrate 1 includes an upper surface 11 , a lower surface 12 and side walls 13 . The sidewall 13 extends from the upper surface 11 to the lower surface 12 . Wherein the upper surface 11 of the first glass substrate 1a is provided with a first filter film 14a; the lower surface 12 of the second glass substrate 1b is provided with a second filter film 14b; the lower surface 12 of the third glass substrate 1c is provided with There is a third filter film 14c. The bracket 4 is provided with a through hole 41, and the first glass substrate 1a, the second glass substrate 1b and the third glass substrate 1c are placed in the through hole 41 parallel to each other in sequence. Wherein the first filter film 14a and the second...

Embodiment 2

[0035] The boss 44 provided on the bracket 4 is replaced by a fourth washer, and the shape of the fourth washer is the same as that of the third washer 7 . The fourth gasket is arranged opposite to the third gasket 7 to lock the glass substrate 1 in the through hole 41 .

[0036] Except for the above structure, other structures of this embodiment are the same as those of Embodiment 1.

[0037] The number of glass substrates 1 and spacers 5 can be increased or decreased according to actual needs.

[0038] In the present invention, both upper and lower are image 3 For reference, relative concepts are used to clarify the present invention.

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Abstract

The invention discloses a novel optical filter, which comprises a bracket and at least two glass substrates; the bracket is provided with a through hole; the glass substrate is arranged in the through hole; at least one of the glass substrates The surface is provided with a filter film, which is characterized in that it also includes at least one spacer; every two adjacent glass substrates are bonded to one of the spacers by a sealant; the sealant connects the glass substrate to the spacer. The gap between the spacers is sealed. Compared with the traditional optical filter, the novel optical filter provided by the present invention has greatly improved the airtightness and moisture resistance of the optical filter film, and the service life is not less than 5 years, which is greatly extended.

Description

technical field [0001] The invention relates to the field of optical elements, in particular to an optical filter. Background technique [0002] Optical filter is an optical part that can attenuate light intensity, change spectral composition or limit vibration plane. Including UV filters, visible filters, infrared filters, bandpass filters, spectroscopic filters, neutral density filters, reflective filters, etc. Wherein, the band-pass filter refers to a filter that passes light of a selected wavelength band and cuts off light of other wavelength bands. The bandpass filter uses the principle of interference to filter light by coating a filter film on the glass substrate to achieve the passage of light in a specific spectral range. For some special bands of light, it cannot be filtered through only one filter film. In order to achieve a wide cut-off range and a deep cut-off depth, a combination of multiple filter films is required. For example, ultraviolet filters used to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20G02B7/00
Inventor 罗新华汤兆胜金怀凯金永军孙玉琴
Owner 上海兆九光电技术有限公司