CN2616927Y - Colour enlarging precise positive-displaying-negative camera-shooting lens - Google Patents
Colour enlarging precise positive-displaying-negative camera-shooting lens Download PDFInfo
- Publication number
- CN2616927Y CN2616927Y CN 03250581 CN03250581U CN2616927Y CN 2616927 Y CN2616927 Y CN 2616927Y CN 03250581 CN03250581 CN 03250581 CN 03250581 U CN03250581 U CN 03250581U CN 2616927 Y CN2616927 Y CN 2616927Y
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- China
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- optical filter
- egative film
- color
- film camera
- negative
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Abstract
The utility model relates to a negative camera for color photofinishing and precise amplification which shows positive images. Before the exposure and print of the pictures, the image information of the negative is read by the negative camera, then the information is analyzed and transformed by the signal processing system, and the images are erectly shown for the operators to preview. The technical proposal is that a set of filters-alternating apparatus comprising a plurality of filters with different colors is arranged in front of the image sensor. The filters with different colors enter the photographic optical path in different time according to a certain order, and the quantity of the different colors of the negative is measured at different time. Adopting only one black-white image sensor can withdraw the information of a plurality of colors, as well as avoid the influence of the dark current of the sensor on measuring accuracy. The utility model has the advantages of simple structure, low cost, high resolution, and high measuring accuracy, which is suitable for using in various photo printers and enlargers.
Description
Affiliated technical field
The utility model relate to a kind of photochrome enlarge and print or smart putting in the color correction analytical equipment of use.The egative film camera reads the egative film image information, and the machine analytic transformation shows with the erect image form as calculated.But operator's preview photo effect, and the comparison film effect is controlled.
Background technology
Existing erect image display device, usually by the egative film camera, Image Information Processing computing machine and display constitute.The egative film camera can be divided into two types by version: monolithic colour image sensor architecture and three picture sensor combinations structures.In the monolithic colour camera, constitute colour splitting system with superfine close grid type color filter, image sensor pixel is divided into red, green, blue three-color.The quantity of shades of colour pixel is about the 1/2-1/4 of the total pixel of imageing sensor, and resolution loss is very big, and its spectrophotometric spectra characteristic is relatively poor, and measuring error is big.The box-like camera of three picture sensor groups adopts the polygon prism colour splitting system, overcome the shortcoming of monolithic colour camera, but owing to need three picture sensors, and polygon prism colour splitting system that need be expensive and accurate assembly technology, the cost height, volume is big, is difficult to use in middle-size and small-size enlargement of color photos machine and dark place enlarger.
Summary of the invention
For overcoming the deficiency of existing erect image display device, the utility model provides a kind of new egative film camera structure, and cost is low, the resolution height, and the spectrophotometric spectra characteristic is good, is adapted at using in various enlargement of color photos machines and the enlarger.
The technical solution adopted in the utility model is: before the imageing sensor of camera, the optical filter wheel changing device that a cover comprises multiple color filter is installed, this device makes the optical filter timesharing in sequence of multiple different colours take turns to enter the shooting light path.Alternating apparatus generally can adopt motor-driven, especially by the good step motor drive of net synchronization capability.After a kind of optical filter of color entered light path, the signal of imageing sensor output was exactly the picture signal of this kind color, and the picture signal of this kind color can be gathered and preserve to the Image Information Processing computing machine.After versicolor image information was all gathered, pattern process computer was analyzed combination to multiple colouring information, can obtain negative map as complete color density information.Develop and print condition in conjunction with photo lithography, negative map is looked like to be converted into erect image be presented on the display, for operator's preview photo effect.If the photo effect is not good enough, the operator can change conditions of exposure, up to satisfaction.Adopt the method for this timesharing measurement image shades of colour component, the color characteristic of measured signal can finish many color measurings with a black and white type imageing sensor, and resolution can not reduce by the spectral characteristic decision of the optical filter that adds.The optional electron image tube of using of imageing sensor, charge-coupled imageing sensor (CCD) or metal oxide image sensor (CMOS).The ccd image sensor wide dynamic range.Cmos image sensor integrated level height, price is low.
The optical filter wheel changing device makes the optical filter timesharing in sequence of various different colours take turns to enter light path with mechanically operated method.A kind of simple and reliable implementation method is: the optical filter with different colours constitutes discoid colour wheel, and rotates with the driven by motor colour wheel.The color combination of optical filter can have multiple.Better simply can be by three kinds of color combination of red, green, blue.This array mode is difficult for the influence of removal of images sensor dark current, and measuring accuracy is relatively poor.For improving measuring accuracy, can on the basis of above-mentioned three kinds of color combination, increase a kind of not black optical filter of saturating visible light.After the black optical filter entered light path, computing machine was sampled to black signal, promptly obtained the information of imageing sensor dark current.Picture signal with three kinds of colors of red, green, blue deducts black signal respectively, and just the influence of energy removal of images sensor dark current improves measuring accuracy.The black optical filter can be opaque versicolor object.More complicated design proposal is to increase yellow and blue or green two colo(u)r filters on the basis that above-mentioned four colour cells are closed again, utilizes these two kinds of color image information can further eliminate the influence of parasitic light to measuring accuracy.Optical filter can be the plastic sheeting of band respective color, optical glass etc., or the plated film optical filter made from vacuum coating technology.Plated film optical filter cost height, but logical photosensitiveness height, measurement performance is good.
The beneficial effects of the utility model are, have realized that with an imageing sensor many colouring informations of egative film extract, and are simple in structure, cost is low, and the resolution height particularly utilizes the black optical filter, realized the measurement and the elimination of imageing sensor dark current, measuring accuracy is improved greatly.
Description of drawings
Accompanying drawing is the structural representation of an embodiment of the utility model egative film camera.
Among the figure, (1) is exposure light source; (2) be egative film to be analyzed; (3) be imaging lens, form by a plurality of lens usually; (4) be the discoid colour wheel that constitutes by red, green, blue and black four colo(u)r filters; (5) be image sensing device; (6) be motor; (7) be the protecting sheathing of camera.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
The optical filter wheel changing device of embodiment is the discoid colour wheel (4) that is made of red, green, blue and black four colo(u)r filters, is driven by motor (6) to rotate.Colour wheel (4) is positioned at the place ahead of imageing sensor (5).When colour wheel rotated, the timesharing in sequence of the optical filter of four kinds of different colours took turns to enter the shooting light path.In the present embodiment structural representation, discoid colour wheel (4) is positioned between imaging lens (3) and the imageing sensor (5).Also colour wheel (4) can be installed in imaging lens (3) before, or colour wheel (4) is installed between a plurality of lens that imaging lens (3) comprised.Exposure light source (1) can be the light source that the egative film camera carries, and also can be the light source of enlargement of color photos machine or enlarger.When exposure light source (1) is the light source of enlargement of color photos machine or enlarger, for not influencing exposure to printing paper, the egative film camera can be tilted install, to avoid the exposure light path of printing paper, perhaps the egative film camera is movably arranged on enlargement of color photos machine or the enlarger, when printing paper is exposed, the egative film camera is moved on to outside the exposure light path of printing paper, perhaps utilize reflective mirror to change the direction of propagation of light.The inclination mounting means is simple and reliable, but the focusing difficulty, anamorphose is big, can be corrected image by computing machine.Imaging lens (3) can be that the egative film camera carries, and also can be the imaging lens of enlargement of color photos machine or enlarger.For making rotating and the strict synchronized relation of image signal's collection maintenance of optical filter, motor (6) can adopt direct current generator or the stepper motor that is easy to control, and the design correspondent control circuits.
Claims (5)
1. an enlargement of color photos essence is put erect image demonstration egative film camera, is made of imageing sensor and colour splitting system, it is characterized in that: colour splitting system is mounted in the optical filter wheel changing device that the preceding cover of imageing sensor comprises multiple color filter.
2. enlargement of color photos essence according to claim 1 is put erect image and shown the egative film camera, it is characterized in that: include red, green, blue and black four kinds of optical filters in the optical filter wheel changing device, versicolor optical filter constitutes discoid colour wheel.
3. put erect image demonstration egative film camera according to claim 1 or the described enlargement of color photos essence of claim 2, it is characterized in that: optical filter is the plated film optical filter made from vacuum coating technology.
4. put erect image demonstration egative film camera according to claim 1 or the described enlargement of color photos essence of claim 2, it is characterized in that: the motor that the drive optical filter is rotated is a stepper motor.
5. put erect image demonstration egative film camera according to claim 1 or the described enlargement of color photos essence of claim 2, it is characterized in that: imageing sensor is a black and white type cmos image sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03250581 CN2616927Y (en) | 2003-04-22 | 2003-04-22 | Colour enlarging precise positive-displaying-negative camera-shooting lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03250581 CN2616927Y (en) | 2003-04-22 | 2003-04-22 | Colour enlarging precise positive-displaying-negative camera-shooting lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2616927Y true CN2616927Y (en) | 2004-05-19 |
Family
ID=34252812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03250581 Expired - Fee Related CN2616927Y (en) | 2003-04-22 | 2003-04-22 | Colour enlarging precise positive-displaying-negative camera-shooting lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2616927Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426380A (en) * | 2019-01-10 | 2020-07-17 | 中国科学院国家空间科学中心 | Filter wheel and method for differential measurement of far ultraviolet band out-of-band stray light |
-
2003
- 2003-04-22 CN CN 03250581 patent/CN2616927Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426380A (en) * | 2019-01-10 | 2020-07-17 | 中国科学院国家空间科学中心 | Filter wheel and method for differential measurement of far ultraviolet band out-of-band stray light |
| CN111426380B (en) * | 2019-01-10 | 2021-01-08 | 中国科学院国家空间科学中心 | Filter wheel and method for differential measurement of far ultraviolet band out-of-band stray light |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |