CN110248072A - A kind of optical filter device improving photoelectronic imaging equipment dynamic range - Google Patents
A kind of optical filter device improving photoelectronic imaging equipment dynamic range Download PDFInfo
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- CN110248072A CN110248072A CN201910596704.2A CN201910596704A CN110248072A CN 110248072 A CN110248072 A CN 110248072A CN 201910596704 A CN201910596704 A CN 201910596704A CN 110248072 A CN110248072 A CN 110248072A
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- Prior art keywords
- optical filter
- imaging equipment
- dynamic range
- photoelectronic imaging
- filter device
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- 230000003287 optical effect Effects 0.000 title claims abstract description 77
- 238000003384 imaging method Methods 0.000 title claims abstract description 44
- 239000011521 glass Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000001259 photo etching Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000004313 glare Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Blocking Light For Cameras (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Present invention discloses a kind of optical filter devices for improving photoelectronic imaging equipment dynamic range, it includes glass substrate, at least one set of optical filter striped group is provided on the glass substrate, the optical filter striped group includes the different optical filter striped of N item (N >=2) cutoff rate, the cutoff rate includes maximum cutoff rate and minimum cutoff rate, and photoelectronic imaging equipment dynamic range improves multiple and determined by the maximum cutoff rate and minimum cutoff rate.A kind of optical filter device of raising photoelectronic imaging equipment dynamic range of the invention, can effectively solve the problem of photoelectronic imaging equipment dynamic range deficiency.
Description
Technical field
The present invention relates to dynamic range of images technical field, in particular to a kind of raising photoelectronic imaging equipment dynamic range
Optical filter device.
Background technique
Line-structured light measurement is projected on a laser rays to object by laser projecting apparatus, and photoelectronic imaging equipment is to having
The image objects of laser stripe, the light characteristics on image correspond to the light of the projector, according to principle of triangulation, it may be determined that fall
In the depth information of object glazed thread.
The characteristics of laser beam has energy strong, good directionality, but in unlike material intersection, such as metal and rubber
Piece, reflected intensity difference reach hundreds times.And for passing through the finished metal materials such as polishing, not due to area light reflection intensity
Together, very strong specular reflection glare interference can be generated.
When the intrinsic dynamic range of CCD or cmos imaging device in photoelectronic imaging equipment are not able to satisfy practical application,
Conventional digital image processing method is promoted by schemes such as control image exposure parameter, image filtering or multiple exposure synthesis
The dynamic range of image.But that there are operands is big for these methods, and it is expose such as multiframe more, it needs to the processing of image successive ignition；
Or data volume is big, such as needs secondary or more exposure, processing data turn over more times, and multiple exposure has the time difference, measures object
It is immovable；Multiple exposure dynamic range of images highest is only capable of being promoted to 120dB, cannot be fully solved the dazzle etc. of laser image
Interference.
Summary of the invention
It is an object of the invention in view of the above-mentioned drawbacks in the prior art, provide a kind of raising photoelectronic imaging equipment dynamic
The optical filter device of range can effectively solve the problem of photoelectronic imaging equipment dynamic range deficiency.
In order to achieve the above-mentioned object of the invention, present invention employs following technical solutions:
A kind of optical filter device improving photoelectronic imaging equipment dynamic range comprising glass substrate, the glass base
At least one set of optical filter striped group is provided on plate, the optical filter striped group includes that N item (N >=2) cutoff rate is different
Optical filter striped, the cutoff rate include maximum cutoff rate and minimum cutoff rate, the raising times of photoelectronic imaging equipment dynamic range
It counts and is determined by the maximum cutoff rate and minimum cutoff rate, the raising multiple=minimum cutoff rate/maximum cutoff rate.
In addition, the invention also includes following attached technical schemes:
The optical filter striped group is arranged on the glass substrate by coating method or photoetching process.
The different optical filter striped of the cutoff rate is arranged successively from small to large according to cutoff rate.
The optical filter device is fixed in the photoelectronic imaging equipment.
The photoelectronic imaging equipment includes image sensor chip, and the optical filter device passes through optics uv-curable glue
It is fixed on described image sensor chip surface.
The width of the optical filter striped and the pixel equivalent width of described image sensor chip.
Compared with the prior art, the invention has the advantages that:
Solve the problems, such as that photoelectronic imaging equipment dynamic range is insufficient by optical filter device, it is different by cutoff rate
Optical filter striped extends the dynamic range of photoelectronic imaging equipment, does not increase image data amount, does not need multiple exposure, finally not
Good laser line image is only obtained under unlike material, also can substantially reduce the interference of metal glare.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for the optical filter device for improving photoelectronic imaging equipment dynamic range of the present invention.
Fig. 2 is that optical filter device is fixed on the schematic diagram in photoelectronic imaging equipment in the present invention.
Fig. 3 is the structural schematic diagram of image sensor chip in the present invention.
Fig. 4 is the schematic diagram after the optical filter striped of optical filter device in the present invention is fixed.
Fig. 5 is that optical filter apparatus structure is intended in the embodiment of the present invention one.
Fig. 6 is the schematic diagram in the embodiment of the present invention one after the fixation of optical filter device.
Fig. 7 is that the image obtained when optical filter device is not used in photoelectronic imaging equipment.
Fig. 8 is that photoelectronic imaging equipment uses the image obtained after optical filter device.
Specific embodiment
In conjunction with the preferred embodiment and its attached drawing is further non-limitingly described in detail technical solution of the present invention.
As shown in Figure 1, corresponding to a kind of optics of the raising photoelectronic imaging equipment dynamic range of preferred embodiment of the present invention
Filter sets comprising glass substrate 1, glass substrate 1 are provided at least one set of optical filter striped group 2, optical filter on one side
Striped group 2 by coating method or photoetching process setting on the glass substrate, optical filter striped group include N item (N >=2) cutoff rate not
Same optical filter striped 3, N optical filter striped are arranged successively from small to large according to cutoff rate.Cutoff rate includes maximum cuts
Only rate and minimum cutoff rate, photoelectronic imaging equipment dynamic range improve multiple and are determined by maximum cutoff rate and minimum cutoff rate, mentioned
High magnification numbe=minimum cutoff rate/maximum cutoff rate.According to the difference of measurement environment, different size of maximum cutoff rate can choose
The dynamic range of current photoelectronic imaging equipment is improved with minimum cutoff rate.
As shown in Figures 2 to 4, optical filter device is fixed in photoelectronic imaging equipment, and photoelectronic imaging equipment includes image
Sensor chip 4, optical filter device are fixed on 4 surface of image sensor chip, specifically, glass base in optical filter device
1 another side of plate is fixed on 4 surface of image sensor chip by optics uv-curable glue, when fixed, by optical filter striped
It is aligned with the column or row of the pixel 41 of image sensor chip 4, grey parts indicate optical filter striped in Fig. 4.
In the width W of setting optical filter striped1When, select the pixel width W of width and image sensor chip2Unanimously,
Large space resolving power is done to obtain.
Embodiment one: assuming that the maximum dynamic range that photoelectronic imaging equipment can receive light intensity is 0-2500, when received light
When strong range is 0-10000, the light intensity within the scope of 1000-10000 is all saturation value, the figure that Electrical imaging equipment is presented at this time
As high dynamic range is presented as shown in fig. 7, the maximum dynamic range of the photoelectronic imaging equipment can be improved with optics filter sets
Image.
As shown in Figure 5 and Figure 6,5 groups of optical filter striped groups, 2,5 groups of optical filter striped groups 2 are provided on glass substrate
Overall width W3Equal to the width W of image sensor chip 44, the height H of optical filter striped group 21Equal to imaging sensor core
The height H of piece 42.Every group of optical filter striped group 2 includes the first optical filter striped 31, the second optical filter striped 32, third
Optical filter striped 33 and the 4th optical filter striped 34, wherein the cutoff rate of the first optical filter striped 31 is 25%, energy
The range of light intensity of transmission is 0-2500；The cutoff rate of second optical filter striped 32 is 50%, and permeable range of light intensity is 0-
5000；The cutoff rate of third optical filter striped 33 is 75%, and permeable range of light intensity is 0-7500；4th optical filter article
The cutoff rate of line 34 is 100%, and permeable range of light intensity is 0-10000；Successively according to the first optical filter striped 31, second
The sequence of optical filter striped 32, third optical filter striped 33 and the 4th optical filter striped 34 arranges.
When received range of light intensity is 0-10000, by the way that the first optical filter striped 31, the second optical filter item is arranged
Line 32, third optical filter striped 33 and the 4th optical filter striped 34 make the range of light intensity penetrated become 0-2500,0-
5000,0-7500,0-10000, it is 0-2500 that photoelectronic imaging equipment, which can only receive range of light intensity, will pass through four optical filter items
The image of line is merged, and the image of high dynamic range can be obtained, as shown in Figure 8.
A kind of optical filter device of raising photoelectronic imaging equipment dynamic range of the invention, passes through optical filter device solution
The problem of photoelectronic imaging equipment of having determined dynamic range deficiency extends photoelectronic imaging by the different optical filter striped of cutoff rate and sets
Standby dynamic range, does not increase image data amount, does not need multiple exposure, finally not only obtains under unlike material good sharp
Light image also can substantially reduce the interference of metal glare.
It is pointed out that the technical concepts and features of above-mentioned preferred embodiment only to illustrate the invention, its object is to
Those skilled in the art can understand the contents of the present invention and implements accordingly, and protection of the invention can not be limited with this
Range.Any equivalent change or modification in accordance with the spirit of the invention should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of optical filter device for improving photoelectronic imaging equipment dynamic range comprising glass substrate, it is characterised in that: institute
It states and is provided at least one set of optical filter striped group on glass substrate, the optical filter striped group includes N item (N >=2) cut-off
The different optical filter striped of rate, the cutoff rate include maximum cutoff rate and minimum cutoff rate, photoelectronic imaging equipment dynamic model
Raising multiple is enclosed to be determined by the maximum cutoff rate and minimum cutoff rate.
2. according to the optical filter device for improving photoelectronic imaging equipment dynamic range described in claim 1, it is characterised in that: described
Optical filter striped group is arranged on the glass substrate by coating method or photoetching process.
3. according to the optical filter device for improving photoelectronic imaging equipment dynamic range described in claim 1, it is characterised in that: described
The different optical filter striped of cutoff rate is arranged successively from small to large according to cutoff rate.
4. according to the optical filter device for improving photoelectronic imaging equipment dynamic range described in claim 1, it is characterised in that: described
Optical filter device is fixed in the photoelectronic imaging equipment.
5. according to the optical filter device for improving photoelectronic imaging equipment dynamic range described in claim 4, it is characterised in that: described
Photoelectronic imaging equipment includes image sensor chip, and the optical filter device is fixed on the figure by optics uv-curable glue
As sensor chip surface.
6. according to the optical filter device for improving photoelectronic imaging equipment dynamic range described in claim 5, it is characterised in that: described
The width of optical filter striped and the pixel equivalent width of described image sensor chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910596704.2A CN110248072B (en) | 2019-07-02 | Optical filter device for improving dynamic range of photoelectric imaging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910596704.2A CN110248072B (en) | 2019-07-02 | Optical filter device for improving dynamic range of photoelectric imaging equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110248072A true CN110248072A (en) | 2019-09-17 |
| CN110248072B CN110248072B (en) | 2024-07-12 |
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