CN107783217A - It is a kind of to have the production technology taken pictures with the optical filter of iris recognition concurrently - Google Patents
It is a kind of to have the production technology taken pictures with the optical filter of iris recognition concurrently Download PDFInfo
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- CN107783217A CN107783217A CN201610721113.XA CN201610721113A CN107783217A CN 107783217 A CN107783217 A CN 107783217A CN 201610721113 A CN201610721113 A CN 201610721113A CN 107783217 A CN107783217 A CN 107783217A
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- filter
- infrared
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- optical filter
- infrared band
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
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- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Filters (AREA)
Abstract
The invention discloses a kind of production technology for having concurrently and taking pictures with the optical filter of iris recognition, including first cutting step, cleaning step, plating steps, checking procedure, secondary cut step and number of assembling steps；When carrying out plating steps, one layer of anti-reflection film is plated respectively on the surface and the back side of full impregnated light glass gasket, one layer of infrared film is plated on the surface of cutoff filter；One layer of ir bandwidth filtering film is plated on the surface of infrared band pass filter；When carrying out number of assembling steps, first it is coated with one layer of water-soluble UV glue on the back side of cutoff filter and the back side of infrared band pass filter respectively by the way of glued silk-screen, and the photomask that one layer of length is less than 0.1mm is coated with a side edge surfaces of cutoff filter, then UV curing glue, then paste cutoff filter and infrared band pass filter on full impregnated light glass gasket by the way of coating is glued.The product optical filtering function admirable produced using the production technology of the present invention, steady quality.
Description
Technical Field
The invention relates to a production process of an optical filter with functions of photographing and iris recognition.
Background
At present, iris identification generally uses an iris identification camera module alone on smart mobile phone, can only be used for iris identification and can not carry out visible light and shoot, and there is the limitation in using on smart mobile phone. The main expression is that need increase a shooting module in addition, not only causes cost, high bulky like this, and camera and iris recognition function switch are troublesome moreover. Meanwhile, the smart phone is compact in structure, and the iris recognition camera module and the photographing camera module are not installed at the same time. Therefore, the industry has developed a camera module compatible with photographing and iris recognition, and the optical filter adopted in the camera module integrates an infrared cut-off optical filter and an infrared band-pass optical filter into a whole, so that the photographing and iris recognition functions can be realized respectively without arranging a switching device. It is therefore necessary to develop a process for producing such a filter of a specific structure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a production process of an optical filter with functions of photographing and iris recognition, and the produced product has excellent optical filtering performance and stable quality and can be applied to a camera module with compatibility of photographing and iris recognition.
The purpose of the invention is realized as follows: a production process of an optical filter with functions of photographing and iris recognition, wherein the produced optical filter is composed of two separate pieces, namely an infrared cut-off optical filter and an infrared band-pass optical filter which are positioned on the same plane are spliced, and the length of the infrared band-pass optical filter is 10-50% of the length of the whole optical filter; a shading film with the length of less than 0.1mm is arranged on the surface of the joint of the infrared cut-off filter and the infrared band-pass filter, and the infrared cut-off filter and the infrared band-pass filter are fixed on the same full-transmission glass gasket;
the production process comprises a primary cutting step, a cleaning step, a film coating step, an inspection step, a secondary cutting step and an assembling step; wherein,
when the cleaning step is carried out, firstly, the glass which is subjected to primary cutting is put into an ultrasonic cleaning machine for cleaning, and then the cleaned glass is dried by spin drying;
when the film coating step is carried out, the dried glass is put into a film coating machine for film coating, namely, the surface and the back surface of the full-transparent glass gasket are respectively coated with an antireflection film, and the surface of the infrared cut-off filter is coated with an infrared film; plating an infrared bandwidth filter film on the surface of the infrared band-pass filter;
when the inspection step is carried out, a spectrometer is adopted to inspect the light transmission wavelength of the semi-finished product coated with the film;
when the secondary cutting step is carried out, firstly, a high-precision cutting machine is adopted to cut the qualified semi-finished product according to the actual required specification, and then cleaning and spin-drying are carried out;
during the assembling step, a layer of water-soluble UV glue is coated on the back surface of the infrared cut-off filter and the back surface of the infrared band-pass filter respectively in a gluing and silk-screen printing mode, a layer of shading film with the length less than 0.1mm is coated on the edge surface of one side of the infrared cut-off filter, then the UV glue is solidified, the infrared cut-off filter and the infrared band-pass filter are pasted on a full-transmission glass gasket in a coating and gluing mode, and then a protective film is pasted on an assembled finished product.
In the production process of the optical filter with the functions of photographing and iris recognition, the shading film is black ink.
In the production process of the optical filter with the functions of photographing and iris recognition, the time for curing the UV glue is 10-13S during the assembling step.
In the production process of the optical filter with the functions of photographing and iris recognition, after the assembling step, finished product inspection, surface mounting and baking are carried out.
The production process of the optical filter with the functions of photographing and iris recognition has the advantages of refining process steps, producing a high-precision product with small area and thin thickness, and producing the product with excellent optical filtering performance and stable quality, and can be applied to a camera module compatible with photographing and iris recognition.
Drawings
FIG. 1 is a plan view of an optical filter with photographing and iris recognition functions produced by the production process of the present invention;
fig. 2 is a cross-sectional view of fig. 1.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1 and 2, the optical filter 10 with functions of photographing and iris recognition produced by the production process of the present invention is composed of two separate pieces, namely, an infrared cut-off filter 11 and an infrared band-pass filter 12 which are positioned on the same plane and spliced together, and the length of the infrared band-pass filter 11 is 10% to 50% of the length of the whole optical filter; a shading film 13 is arranged on the surface of the joint of the infrared cut-off filter 11 and the infrared band-pass filter 12, and the infrared cut-off filter 11 and the infrared band-pass filter 12 are fixed on the same full-transmission glass gasket 14;
the production process of the optical filter with the functions of photographing and iris recognition comprises a primary cutting step, a cleaning step, a film coating step, an inspection step, a secondary cutting step and an assembling step; wherein,
when the primary cutting step is carried out, cutting the glass blank into a size convenient for the subsequent processing step;
when the cleaning step is carried out, firstly, the glass which is subjected to primary cutting is put into an ultrasonic cleaning machine for cleaning, and then the cleaned glass is dried by spin drying;
when the coating step is carried out, the dried glass is put into a coating machine for coating, namely, antireflection films with the thickness of less than 1um are respectively coated on the surface and the back of the full-transparent glass gasket, and an infrared film with the thickness of 3-5 um is coated on the surface of the infrared cut-off filter; plating a layer of infrared bandwidth filtering film with the thickness of 5-6 um on the surface of the infrared band-pass filter;
when the inspection step is carried out, firstly, a spectrometer is adopted to inspect the light transmittance wavelength of the semi-finished product coated with the film, namely, the light transmittance of the infrared cut-off filter to visible light with the wavelength of 420 nm-800 nm is inspected to be more than 90%, the light transmittance of the infrared band-pass filter to near infrared light with the wavelength of 800 nm-810 nm is inspected to be more than 90%, visible light with the wavelength of 420 nm-800 nm and far infrared light with the wavelength of more than 810nm are filtered out, and the light transmittance of the full-light-transmitting glass gasket to light with the wavelength of 420 nm-850 nm is inspected to be more than 90%; cleaning the qualified semi-finished product, including cleaning by an ultrasonic cleaning machine and removing bubbles by a film covering mode;
when the secondary cutting step is carried out, firstly, a high-precision cutting machine is adopted to cut the qualified and cleaned semi-finished product according to the actual required specification, so that the sum of the lengths of the infrared cut-off filter and the infrared band-pass filter is equal to the length of the full-transmission glass gasket, then the cut glass is subjected to ultrasonic cleaning and spin-drying, and then the glue is removed in a white film coating mode;
when the assembling step is carried out, water-soluble UV glue is coated on the back surface of the infrared cut-off filter and the back surface of the infrared band-pass filter respectively in a gluing and silk-screen printing mode, a layer of black ink (shading film) with the length less than 0.1mm is coated on the edge surface of one side of the infrared cut-off filter, the difference value between the sheet and the sheet is ensured to be 0.025-0.03 mm, then the UV glue is solidified, the solidification time is 10-13S, the infrared cut-off filter and the infrared band-pass filter are pasted on a full-transmission glass gasket in a coating and gluing mode, and then a protective film is pasted on the assembled finished product;
after the assembling step, carrying out finished product inspection, surface mounting and baking, wherein the finished product inspection comprises appearance size inspection, and direction consistency inspection of an infrared film on an infrared cut-off filter and an infrared bandwidth filter film on an infrared band-pass filter; the chip mounting is carried out on a high-precision full-automatic dispensing and chip-dropping integrated machine, the dispensing air pressure is 0.3-0.5 KPa, the chip-dropping height is 13mm +/-0.01 mm, the diameter of a dispensing needle head is 0.05mm, and the dispensing width of the combined part of the infrared cut-off filter and the infrared band-pass filter is 0.05-0.07 mm; the baking is carried out in a 100-grade clean oven at the temperature of 95 +/-5 ℃ for 60 +/-5 min.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (4)
1. The production process of the optical filter with the functions of photographing and iris recognition is characterized in that the optical filter is formed by splicing an infrared cut-off optical filter and an infrared band-pass optical filter which are positioned on the same plane, and the length of the infrared band-pass optical filter is 10-50% of the length of the whole optical filter; a shading film with the length of less than 0.1mm is arranged on the surface of the joint of the infrared cut-off filter and the infrared band-pass filter, and the infrared cut-off filter and the infrared band-pass filter are fixed on the same full-transmission glass gasket;
the production process comprises a primary cutting step, a cleaning step, a film coating step, an inspection step, a secondary cutting step and an assembling step; wherein,
when the cleaning step is carried out, firstly, the glass which is subjected to primary cutting is put into an ultrasonic cleaning machine for cleaning, and then the cleaned glass is dried by spin drying;
when the film coating step is carried out, the dried glass is put into a film coating machine for film coating, namely, the surface and the back surface of the full-transparent glass gasket are respectively coated with an antireflection film, and the surface of the infrared cut-off filter is coated with an infrared film; plating an infrared bandwidth filter film on the surface of the infrared band-pass filter;
when the inspection step is carried out, a spectrometer is adopted to inspect the light transmission wavelength of the semi-finished product coated with the film;
when the secondary cutting step is carried out, firstly, a high-precision cutting machine is adopted to cut the qualified semi-finished product according to the actual required specification, and then cleaning and spin-drying are carried out;
during the assembling step, a layer of water-soluble UV glue is coated on the back surface of the infrared cut-off filter and the back surface of the infrared band-pass filter respectively in a gluing and silk-screen printing mode, a layer of shading film with the length less than 0.1mm is coated on the edge surface of one side of the infrared cut-off filter, then the UV glue is solidified, the infrared cut-off filter and the infrared band-pass filter are pasted on a full-transmission glass gasket in a coating and gluing mode, and then a protective film is pasted on an assembled finished product.
2. The process for manufacturing an optical filter with functions of photographing and iris recognition as claimed in claim 1, wherein the light-shielding film is black ink.
3. The process for manufacturing an optical filter with functions of photographing and iris recognition as claimed in claim 1, wherein the time for curing the UV glue is 10S to 13S during the assembling step.
4. The process for manufacturing an optical filter with functions of photographing and iris recognition as claimed in claim 1, wherein the assembling step is followed by final product inspection, pasting and baking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721113.XA CN107783217A (en) | 2016-08-24 | 2016-08-24 | It is a kind of to have the production technology taken pictures with the optical filter of iris recognition concurrently |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721113.XA CN107783217A (en) | 2016-08-24 | 2016-08-24 | It is a kind of to have the production technology taken pictures with the optical filter of iris recognition concurrently |
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| Publication Number | Publication Date |
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| CN107783217A true CN107783217A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610721113.XA Pending CN107783217A (en) | 2016-08-24 | 2016-08-24 | It is a kind of to have the production technology taken pictures with the optical filter of iris recognition concurrently |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357446A (en) * | 2019-07-15 | 2019-10-22 | 浙江美迪凯现代光电有限公司 | A kind of Novel gluing coating process |
| CN112764147A (en) * | 2021-01-27 | 2021-05-07 | 苏州京浜光电科技股份有限公司 | Production method of camera module assembly |
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| CN103152517A (en) * | 2013-02-06 | 2013-06-12 | 北京中科虹霸科技有限公司 | Imaging module for movable iris recognition equipment and movable equipment |
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| CN105511003A (en) * | 2015-12-08 | 2016-04-20 | 江苏星浪光学仪器有限公司 | High-performance optical filter production and processing technology |
| CN205490825U (en) * | 2016-01-06 | 2016-08-17 | 富港电子（东莞）有限公司 | Dual Band Spectral Lens Module |
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| CN1847972A (en) * | 2005-04-15 | 2006-10-18 | 普立尔科技股份有限公司 | Monolithic color wheel and method of manufacturing the same |
| CN103152517A (en) * | 2013-02-06 | 2013-06-12 | 北京中科虹霸科技有限公司 | Imaging module for movable iris recognition equipment and movable equipment |
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| CN110357446A (en) * | 2019-07-15 | 2019-10-22 | 浙江美迪凯现代光电有限公司 | A kind of Novel gluing coating process |
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Application publication date: 20180309 |