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Novel optical filter

An optical filter, a new type of technology, applied in the direction of optical filters, optics, optical components, etc., can solve the problems of poor sealing effect, affect the optical aperture of the optical filter, reduce the filtering efficiency, etc., and achieve sealing and moisture resistance. improved effect

Active Publication Date: 2014-07-30
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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Effect test

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. The novel optical filter comprises a support and at least two glass substrates. Through holes are formed in the support, the glass substrates are arranged in the through holes and at least one surface of each glass substrate is provided with a light filtering film. The novel optical filer is characterized in that the novel optical filter further comprises at least one space ring; every two adjacent glass substrates are bonded with one space ring through sealant; the sealant seals gaps between the glass substrates and the space rings. Compared with a traditional optical filter, the novel optical filter has the advantages that the sealing performance and the moisture resistance of the light filtering films are greatly improved, and the service life of the novel optical filter is not shorter than five years and is greatly prolonged.

Description

technical field [0001] The invention relates to the field of optical elements, in particular to a novel 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 use...

Claims

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Application Information

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Patent Type & Authority Applications(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
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