CN2601399Y - Optical measurer - Google Patents
Optical measurer Download PDFInfo
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- CN2601399Y CN2601399Y CN 03202182 CN03202182U CN2601399Y CN 2601399 Y CN2601399 Y CN 2601399Y CN 03202182 CN03202182 CN 03202182 CN 03202182 U CN03202182 U CN 03202182U CN 2601399 Y CN2601399 Y CN 2601399Y
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Abstract
The utility model discloses an optical measuring device, which is suitable for measuring the resolution capability of projector lens, meanwhile, the projector lens project out an image. The optical measuring device comprises a screen, an image taking unit, a homogeneous filter and a data processing module. The image taking unit is arranged on the screen for receiving the image projected to the screen and outputting the analog image signal corresponding to the projected image. The homogeneous filter is arranged on the screen corresponding to the position of the image taking unit for controlling and attenuating the image brightness. The data processing module is connected with the image taking unit for receiving the analog image signal and calculating the resolution capability of the projector lens.
Description
Technical field
The utility model is about a kind of optical measuring device, particularly about a kind of optical measuring device that can accurately measure the resolving power of projector lens.
Background technology
In general, in order to assess the resolving power height of a projector lens (projector lens), can adopt several traditional measurement mechanisms.
For example, see also Fig. 1, when a projector 2 via its camera lens 21 during to screen 11 projection one image S, the ccd video camera 12 that this image S can be positioned at the another location receives.Then, ccd video camera 12 can be sent in the image processor (not shown) by the analog image signal that it is received, convert the analog image signal to the digitized video signal via image processor after, be resent in the computing machine (not shown).Then, the optical analysis program in the computing machine is calculated MTF (modulation transfer function) value of this digitized video signal, and the height of mtf value can determine the resolving power height of the camera lens 21 of this projector 2.
Yet, still see also Fig. 1, because ccd video camera 12 itself promptly has a camera lens 13, so have problems such as camera lens focusing or optical distortion.When ccd video camera 12 receives image S from projector 2 via its camera lens 13, the resolution of this image S has just produced error, therefore, analyzing resulting mtf value via subsequent treatment more also can be inaccurate, and can't accurately know the true resolving power height of the camera lens 21 of projector 2.
The utility model content
The purpose of this utility model is to overcome the optical measuring device of above shortcoming.
The purpose of this utility model is achieved in that promptly provides a kind of optical measuring device, is applicable to the resolving power of measuring a projector lens, and described projector lens is for projecting an image, and described optical measuring device comprises:
One screen;
One image acquisition unit is arranged on the described screen, is projected to the described image of described screen in order to reception, and exports the analog image signal corresponding to described image;
One homogeneous filter is arranged on the described screen, and corresponding to the position of described image acquisition unit, is in order to decay and controls the brightness of described image; And
One data processing module is connected in described image acquisition unit, is in order to receive the resolving power that described analog image signal also calculates described projector lens according to this.
The utility model adopts as detailed below feature to solve the above problems basically.That is to say that the utility model is applicable to the resolving power of measuring a projector lens, simultaneously, this projector lens system is for projecting an image, and the utility model comprises a screen; One image acquisition unit is arranged on this screen, is this image that is projected to this screen in order to reception, and output is corresponding to an analog image signal of this image; One homogeneous filter is arranged on this screen, and corresponding to the position of this image acquisition unit, in order to decay and control the brightness of this image; And a data processing module, be connected in this image acquisition unit, in order to receive this analog image signal and to calculate the resolving power of this projector lens according to this.
Simultaneously, according to optical measuring device of the present utility model, this data processing module more comprises an image processor and a computing machine, this image processor system becomes a digitized video signal in order to change this analog image signal, and export this digitized video signal, this department of computer science is in order to receiving this digitized video signal, and calculates the modulating transfer function value (modulation transferfunction value) of this projector lens.
In the utility model, this image acquisition unit is a ccd sensor.
In the utility model, this ccd sensor cording has the above resolution of 640 * 480 pixels.
In the utility model, this image processor cording has the above resolution of 640 * 480 pixels.
In the utility model, more comprise a bearing, be connected in this screen, in order to support this screen.
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, preferred embodiment cited below particularly and conjunction with figs. elaborate.
Description of drawings
Fig. 1 is the synoptic diagram of the optical measurement mode of a traditional projector lens;
Fig. 2 A is the synoptic diagram of the optical measurement mode of projector lens of the present utility model; And
Fig. 2 B shows the front-view schematic diagram according to the optical measuring device of Fig. 2 A.
Symbol description
The optical measuring device of 1～traditional projector lens
2～projector
11～screen
12～ccd video camera
13～camera lens
21～camera lens
100～optical measuring device
110～screen
120～image acquisition unit
130～homogeneous filter
140～data processing module
150～bearing
200～projector
210～camera lens
S～image
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described.
See also Fig. 2 A and Fig. 2 B, the optical measuring device 100 of present embodiment mainly includes a screen 110, a plurality of image acquisition unit (a for example ccd sensor) 120, a plurality of homogeneous filter (neutraldensity filter) 130 and one data processing module 140.Image acquisition unit 120 all is to be arranged on the screen 110 with homogeneous filter 130, and homogeneous filter 130 is corresponding to image acquisition unit 120.Data processing module 140 is to be connected in image acquisition unit 120.
When a projector 200 via its camera lens 210 projections one image S to screen 110 time, be arranged at a plurality of image acquisition units 120 on the screen 110 and just can see through homogeneous filter 130 and receive this image S, export an analog image signal then corresponding to image S.Then, data processing module 140 can receive the analog image signal that sends from image acquisition unit 120, and calculates the resolving power of the camera lens 210 of projector 200 according to this analog image signal.
Detailed, data processing module 140 has an image processor (frame grabber does not show) and a computing machine (not shown).Data processing module 140 promptly is to receive the analog image signal that sends from image acquisition unit 120 by image processor, and image processor can convert this analog image signal to one digitized video signal.Then, image processor can export this digitized video signal in the computing machine to again, and calculate modulating transfer function value (the modulation transfer function value of this digitized video signal via the optical analysis program in the computing machine, MTF value), the height of this modulating transfer function value of trying to achieve is by analysis promptly represented certain resolving power height of the camera lens 210 of projector 200.
Adopt the reason of homogeneous filter then to be described as follows as for present embodiment.Because in order to avoid the problems such as lens distortions of traditional ccd video camera, so present embodiment is to adopt not have a ccd sensor (image acquisition unit 120) of camera lens, and is arranged at it on screen, to reduce the optical parallax of its image that received.Yet, lose the protection of camera lens when ccd sensor after, that is lose the aperture protection of camera lens, the received image of ccd sensor all is saturated white image.And the homogeneous filter itself has the function of similar lens aperture, if in the place ahead of ccd sensor one homogeneous filter is set, then can decay and control the brightness or the light quantity of incidental image picture, with meet ccd sensor the range of light intensities of receptible incidental image picture.In addition, because the homogeneous filter is a kind of plane filter,, just can not cause the problem of dtmf distortion DTMF of incidental image picture so can not change the direct of travel of light yet.
It should be noted that present embodiment can also adopt a plurality of homogeneous filters with different brightness decay ratios simultaneously, so that ccd sensor can receive the image of different brightness ranges.
In addition, in the present embodiment, image acquisition unit (ccd sensor) 120 and image processor all can have the above resolution of 640 * 480 pixels.Simultaneously, optical measuring device 100 also can have a bearing 150 that is connected in screen 110, with support screen 110.
Though the utility model is disclosed in preferred embodiment; right its is not in order to limit the utility model; any insider; in not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is as the criterion when looking the accompanying Claim book person of defining.
Claims (6)
1. an optical measuring device is applicable to the resolving power of measuring a projector lens, and described projector lens is characterized in that for projecting an image described optical measuring device comprises:
One screen;
One image acquisition unit is arranged on the described screen, is projected to the described image of described screen in order to reception, and exports the analog image signal corresponding to described image;
One homogeneous filter is arranged on the described screen, and corresponding to the position of described image acquisition unit, is in order to decay and controls the brightness of described image; And
One data processing module is connected in described image acquisition unit, is in order to receive the resolving power that described analog image signal also calculates described projector lens according to this.
2. optical measuring device as claimed in claim 1, wherein, described data processing module also comprises an image processor and a computing machine, described image processor becomes a digitized video signal in order to change described analog image signal, and export described digitized video signal, described computing machine is in order to receiving described digitized video signal, and calculates the modulating transfer function value of described projector lens.
3. optical measuring device as claimed in claim 1, wherein, described image acquisition unit is a ccd sensor.
4. optical measuring device as claimed in claim 3, wherein, described ccd sensor has the above resolution of 640 * 480 pixels.
5. optical measuring device as claimed in claim 2, wherein, described image processor has the above resolution of 640 * 480 pixels.
6. optical measuring device as claimed in claim 1 also comprises a bearing, is connected in described screen, in order to support described screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03202182 CN2601399Y (en) | 2003-01-21 | 2003-01-21 | Optical measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03202182 CN2601399Y (en) | 2003-01-21 | 2003-01-21 | Optical measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2601399Y true CN2601399Y (en) | 2004-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03202182 Expired - Fee Related CN2601399Y (en) | 2003-01-21 | 2003-01-21 | Optical measurer |
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| CN (1) | CN2601399Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464208B (en) * | 2008-12-30 | 2011-04-06 | 上海徕木电子股份有限公司 | Production method of television line diagram for testing photoelectronic imaging system resolution power |
| CN102749183A (en) * | 2012-05-25 | 2012-10-24 | 苏州佳世达光电有限公司 | System, method and device for detecting projection picture of projector |
| CN106358037A (en) * | 2015-07-21 | 2017-01-25 | 九骅科技股份有限公司 | Shot detection method |
| CN106441804A (en) * | 2015-08-04 | 2017-02-22 | 宁波舜宇光电信息有限公司 | Resolving power testing method |
| CN107153000A (en) * | 2017-06-20 | 2017-09-12 | 中国地质大学（武汉） | A kind of portable filter optical performance detecting device and its detection method |
-
2003
- 2003-01-21 CN CN 03202182 patent/CN2601399Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464208B (en) * | 2008-12-30 | 2011-04-06 | 上海徕木电子股份有限公司 | Production method of television line diagram for testing photoelectronic imaging system resolution power |
| CN102749183A (en) * | 2012-05-25 | 2012-10-24 | 苏州佳世达光电有限公司 | System, method and device for detecting projection picture of projector |
| CN106358037A (en) * | 2015-07-21 | 2017-01-25 | 九骅科技股份有限公司 | Shot detection method |
| CN106358037B (en) * | 2015-07-21 | 2018-03-02 | 九骅科技股份有限公司 | lens detection method |
| CN106441804A (en) * | 2015-08-04 | 2017-02-22 | 宁波舜宇光电信息有限公司 | Resolving power testing method |
| CN106441804B (en) * | 2015-08-04 | 2019-08-30 | 宁波舜宇光电信息有限公司 | Resolving power test method |
| CN107153000A (en) * | 2017-06-20 | 2017-09-12 | 中国地质大学（武汉） | A kind of portable filter optical performance detecting device and its detection method |
| CN107153000B (en) * | 2017-06-20 | 2023-10-31 | 中国地质大学（武汉） | Portable filter optical performance detection device and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040128 |