SU1610470A1 - Device for checking performance of viewfinder/rangefinder of camera - Google Patents

Abstract

The invention relates to photographic equipment and makes it possible to increase the accuracy and expand the operational capabilities of devices for monitoring the accuracy of the viewfinder of a camera range. The monitoring device further comprises a luminous test object 10 installed in the plane of placement of the photographic film of the monitored camera 9, and a control optical unit, the grid with grooves 6 of which and the recorder 8 are optically matched with each other by the beam-splitting mirror 5 and with the camera-controlled 9 through an additional beam-splitting mirror 4 and lens 1 collimating unit. In the process of adjusting the camera lens 9 is set to extreme positions and, observed in the viewfinder, using adjusting movements of the rangefinder elements, no duplication of the image of the strokes of the grid 2 in the position of the camera lens and the absence of doubling of the image of the strokes of the grid 6 in the position of the lens corresponding to its near focus limit is achieved. 3 il.

Description

The invention relates to photographic equipment,; specifically to the equipment for the control of sites of photoanplates.

The aim of the invention is to improve the accuracy and enhance the operational capabilities.

Fig, 1 shows a diagram of the device; Fig. 2 illustrates an example of an image recorder; Fig. 3 is a view of the field of view of the viewfinder of the distance meter of the controlled camera.

A device for controlling the accuracy of the viewfinder of the camera rangefinder (Fig 1) contains a chipper unit that includes a lens 1 mesh with strokes 2, an illuminator 3 and the first beam-splitting mirror 4, a control unit including a second beam-splitting mirror 5, a grid 6 with strokes, the illuminator 7 and the image recorder 8, the controlled camera 9 and the luminous test object U, made, for example, in the form of a grid with a dashed world on an opaque background, illuminated by an 11 hp. The first beam-splitting mirror 4 is installed under scrap 45 to the optical axis of the lens 1, second beam splitter mirror 5 forms an angle of 45 to the broken first svetodeli- trlnym mirror 4 about the optical axis of | bektiva 1 collimating unit,

opportunity

parallel to the first optical beam splitting mirror 4 of the optical axis of the lens 1, Viewfinder-rangefinder: the camera 9 is optically coupled to the grids 2 and 6, and the image recorder 8 with the light test object 10, the World of the test object 10 is located in the center of the personnel window of the camera 9, due to the presence on the test object 10 of a grid of centering stops RZ, the Registrar 8 is designed as a pidicon 1 4 | (Fig, 2), connected to the zideocontrol device 15, on the screen of the video monitor there is a central cross-hair 16. and the border i 7 of the tolerance zone for: .13 images 18 light of the test sample 10 (worlds),

The device works as follows

The controllable camera 9 (Fig. 1) is fixed on the adjustment table C and its objective lens i is installed and the control unit i is capable of (moving along the scale 12,

tive in position with. The control block is shifted along a scale of 12 times to a peak. In this case, the grid intersection 6 and the image analysis plane of the recorder will be located in the focal plane of lens 1. 9 (Fig. 3). The frame and overlap images are indicated here by the positions 20 and 21, respectively. In the general case, in the area of the rangefinder 22, ghosting of the image will be observed in both vertical and horizontal Q. directions (fig. 3). In the frame window of the camera 9 (Fig. 1) set the test object 10 and on the screen of the video control device 15 5 (Fig. 2) see the image 18 of the test object. In a properly adjusted camera 9, it must be within the zone bounded by strokes 17. The Q element of the world 10 must be resolved. If these requirements are not complied with, they clarify the alignment. Next, the accuracy of the viewfinder of the camera 9 is performed. The control unit is displaced along the scale 12 (FIG. 1) to a position in which the image of the grid lines 6 is projected into the plane of the near focus limit of the lens of the camera 9 being controlled. is set to the position corresponding to the near focus limit. In the case of correct alignment of the camera 9, the image of the light of the test test object 10 on the screen of the video monitor 15 (Fig. 2) will be sharp (will be the specified element of the worlds is resolved), and the image of the grid 6 (Fig. 1) viewed in the camera 9's viewfinder (Fig. 1) in the rangefinder area will not have a duplicate. Otherwise, you need to adjust the viewfinder of the camera 9 distance range by changing the gear ratio 15

50

55

mechanisms that determine the movement of the camera lens 9 and the rotation of the rangefinder mirror. In the process of adjusting the camera lens 9 after

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is set to the extreme position and, observed in the viewfinder by means of adjusting nodvizhek elements of the rangefinder, achieve the absence of duplication of the image of the grid lines 2 in the CX lens position and the absence of image duplication; -}; yen the lines of the grid 6 in the lens position corresponding to its near focus limit. In order to control the accuracy of the viewfinder rangefinder at intermediate distances to the subject, the control unit is displaced along the scale 12 to the positions corresponding to these distances. In the position of the control unit, the distance to the subject is measured to achieve the absence of doubling of the image of the streaks of the grid 6 in the field of view of the camera viewfinder 9. In the image of the worlds 18 on the screen of the video monitor 15 (Fig. 2) the specified element should be resolved.

Claims (1)

Invention Formula A device for controlling the operation of the camera's viewfinder, containing a collimating unit placed in front of the camera's lens with a frame window, made in the form of an illuminator, a lens and a grid with strokes located in its focal plane, 10 four 0 5 15 0 five 706 1C is the weight of the fact that, in order to increase the accuracy of monitoring and expanding the operational capabilities, it is equipped with a light test pane located in the plane of the photographic film in the center of the personnel window, and a control unit made in the form of an illuminator with an additional grid with dashes and a recorder, the analysis plane of which is optically coupled to the plane of installation of an additional grid with dashes through a beam-splitting mirror located in front of the additional s on the optical axis of the control optical unit at an angle of 45 to drink, while the additional grid with strokes is optically coupled to the camera's range finder through the additional beamstop mirror mounted on the optical axis at an angle of 45 ° to it, between the lens and the grid with strokes the collimating unit, and the recorder is optically coupled through the beacon mirror of the control optical unit and the additional beamsplitter mirror with the light test object, the control unit OK is mounted for movement along the optical axis relative to the entered scale rigidly associated with the collimating unit. / FIG. 2 I / - / IB 17 Fig.Z four 21