JPH0536438U - Microscope photography device with auto bracket function - Google Patents

Abstract

(57) [Summary] [Purpose] This is to enable continuous shooting in a short time without interruption even when the number of remaining films in the camera back is less than the set number of shots. When a film end is detected by a film end detection means 17 for detecting the remaining film number 0 of a camera back to be used, a camera optical path switching unit 18 and a winding drive switching unit 20 for driving a film winding motor in the camera back. It is designed to switch between and. When the film on the first camera back 10 runs out during auto bracket shooting, the film end detection means 10 detects this, and the camera back 11 is used by switching the camera optical path, etc. You can continue bracket shooting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a microscope photography apparatus having an auto-bracket function for continuously photographing a specimen while automatically changing an exposure value.

[0002]

[Prior Art]

 When a photograph of a specimen image observed with a microscope is taken, the specimen image with the exposure value slightly changed depending on the photographer's need may be continuously projected on the film. Also, if the sample is a fluorescent sample, the fading phenomenon that the amount of fluorescent light decreases during shooting may occur, so the exposure value is continuously changed accordingly and shooting is performed with the exposure properly controlled. There are cases. In such a case, it is necessary to perform auto bracket shooting.

In auto bracket shooting, usually, an exposure correction value is set in advance for exposure time calculated from a photometric value measured by a photometric unit of a photographic device, and exposure correction is performed. By setting multiple exposure compensation values according to the number of shots before shooting, it is possible to shoot continuously while changing the exposure value. However, during auto bracket shooting, if the remaining number of films in the camera back is less than the number of shots set when the exposure compensation value was set, sample shooting after the film is cut will not be performed. Since this is not the case, the film had to be reset in the camera back and auto bracket shooting had to be performed again for the remaining number of shots, which was extremely complicated. Moreover, when the subject is a fluorescent specimen, there is the inconvenience of missing the photo opportunity because the fading has progressed in the meantime.

As means for improving such inconvenience, for example, when the number of remaining films of the camera is less than the set continuous shooting number, as in the photographic device of Japanese Patent Application Laid-Open No. 61-148437, the remaining film remains. There is a means to display a warning of insufficient frames. Further, in the photographic device of JP-A-59-172634, a plurality of cameras can be attached to the photographic microscope, and the same film can be attached to these cameras so that the cameras used for the photography can be used. After shooting the remaining number of films, you can manually switch the optical path of the camera, and set the exposure compensation value for the remaining number of shots required for auto bracket shooting again to perform auto bracket shooting again. It is like this.

[0005]

[Problems to be solved by the device]

 However, in any case, the above-mentioned method can only perform auto bracket shooting for the number of films remaining in the camera to be used, and in order to shoot as many shots as desired by the photographer, the former method is required. In this case, the camera used had to be rewound at the end of the film, a new film was attached, and the shooting had to be continued. In the latter case, the complicated operation as described above was required. In either case, the imaging has to be interrupted once, and it takes time. Therefore, the inconvenience of the above-mentioned exchange or switching operation being complicated and the inconvenience of missing the shutter chance in the case of the fluorescent sample are sufficient. It was not something that could be improved.

The present invention has been made in view of such a problem, and when performing auto bracket shooting, even if the number of remaining films of the camera used is less than the set number of shots, the number of shots desired by the photographer. It is an object of the present invention to provide a microscope photography device with an auto bracket function, which enables continuous shooting of minutes in a short time.

[0007]

[Means for Solving the Problems]

 The microscope photo-taking device with auto-bracketing function according to the present invention can switch the camera optical path to one of a plurality of camera backs, and continuously changes the exposure value based on a plurality of input exposure correction values. In a microscope photographic device equipped with an auto-bracketing function capable of taking a picture, the film end detection means for detecting that the number of remaining films in the camera back whose camera optical path is selected is 0, and this film end detection means It is equipped with a switching means for switching the optical path to another camera back when the film end is detected, and when the film end is detected, the camera back is switched to continue continuous shooting. Is.

[0008]

[Action]

 If auto bracket shooting is performed and the film is still in use or the remaining film in the camera back is 0 before the set number of shots have been taken, the film end detection means detects this and the switching means is activated. Then, the camera optical path and the motor winding drive signal are switched to another camera back to continue shooting, and continuous shooting is performed without interruption until the set number of shots are completed.

[0009]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an optical path diagram of the photographing apparatus according to the present embodiment. In the figure, 1 is a sample illuminated by an illumination means (not shown), 2 is an objective lens through which the illumination light of the sample 1 passes, and 3 is A prism for bending the optical path, 4 is a photographic eyepiece lens arranged behind it, 5 is a splitting prism for splitting a light beam into two optical paths, 6 is a projection lens through which one of the split light beams passes, 7 Is a light receiving element in a photometry unit described later, which is arranged at a light beam image forming position by the projection lens 6, 8 is a shutter which controls passage and blocking of the other light beam split by the splitting prism 5 by a photographing control unit described later, Reference numeral 9 denotes a camera optical path switching prism for switching the optical path of the light flux passing through the shutter 8 to the camera back, and 10 denotes a camera optical path switching prism located on one of the camera optical paths. Camera back, 11 also a second camera back positioned on the other of the camera optical path.

Next, the photographing control section of the photographing apparatus will be described with reference to the block diagram shown in FIG. In the figure, reference numeral 12 denotes a photometry unit that includes the light receiving element 7 and performs photometry on the sample 1 which is a subject, and 13 indicates a setting condition such as an exposure correction value for auto bracket photography and a film sensitivity setting. The switch input unit 14 is a CPU which stores various kinds of information based on the input information and controls the operation of each block described below. Reference numeral 15 is a display unit for monitoring shooting conditions, exposure time, etc., 16 is a shutter drive unit for controlling the opening / closing operation of the shutter 8, and 17 is the rest of the film in the camera back 10 or 11 used for shooting. This is a film end detection unit that counts the number of images, for example, each time of shooting. This is provided inside the CPU 14, and the number of remaining films at the start of shooting of the first camera back used is manually set by the switch input unit 13. , Or the number of films in the DX code attached to the film is automatically input. Reference numeral 18 is a camera optical path switching unit for rotating and operating the camera optical path switching prism 9 when the film end detection means 17 detects the film end, and 19 is a film built in the first and second camera backs 10 and 11. A winding drive unit that outputs a signal for driving one of the winding motors 10a and 11a, and 20 is connected between the winding drive unit 19 and both motors 10a and 11a, and is a motor drive signal that is interlocked with the switching of the camera optical path. It is a winding drive switching unit that switches the supply direction of.

The present embodiment is configured as described above. Next, a shooting sequence for performing auto bracket shooting will be described based on the flowchart shown in FIG. First, it is assumed that the number of shots for the auto bracket shooting and the exposure correction value at each shooting are preset and input to the CPU 14 from the switch input unit 13.

Then, during auto bracket shooting, an exposure correction value set in advance for the number of shots set in advance is loaded with respect to the exposure time calculated from the photometric value by the photometry unit 12, and the actual exposure is calculated based on this correction value. The exposure time of is calculated. Next, assuming that the camera back currently used is the first camera back 10, it is detected whether or not the number of remaining films in the camera back 10 is zero. This is carried out by the film end detection means 17 by comparing and calculating the remaining number of films in the camera back 10 and the film count data counted for each photographing. When the remaining film is not 0, the exposure operation is performed according to the calculated exposure time, and the sample 1 is photographed. Then, this series of operations is repeated for the preset number of shots, and the shooting is completed.

Further, when the film of the first camera back 10 is exhausted during the shooting, the film end detection means 17 detects this and the CPU 14 activates the camera optical path switching unit 18 to activate the camera optical path. The switching prism 9 is rotated to switch the camera optical path toward the second camera back 11. At the same time, the winding drive switching unit 20 is also switched to energize the motor 11a. Then, the exposure operation is subsequently performed, and the above-described shooting operation is repeated by the camera back 11 for the remaining number of shots, and the shooting ends.

As described above, according to the present embodiment, when the remaining number of films of the camera back 10 used for the first time is smaller than the set number of shots, shooting is interrupted for film replacement, camera switching, or the like. Instead, the camera back 11 can be automatically switched to continue shooting for the remaining set number of shots, and continuous shooting for the desired number of shots can be performed in a short time. Therefore, even if the subject is a fluorescent sample, you will never miss a photo opportunity. Moreover, since the structure of this embodiment is relatively simple, this can be realized at a low manufacturing cost.

In the above-described embodiment, the film end detection means 17 counts each filming as the film count data, but the invention is not limited to this, and other suitable means such as a film can be used. Since the film winding motor is locked at the end, the film end may be detected by detecting the motor lock current value by the detector. Alternatively, a means may be used in which the timer is started after the start of the winding drive, and when the winding completion signal is not output within a fixed time, this is detected as the film end. In the embodiment, the film end detection is performed for each auto bracket shooting, but at the time of setting the number of shots, the set number is compared with the number of remaining films in the first camera back to start shooting. Before that, the CPU 14 may be made to recognize in advance how many sheets the camera back should be switched to.

Although the camera back and the camera optical path are two in the embodiment, the number is not limited to this, and an appropriate number can be set. Further, in the above-mentioned embodiment, the normal photography has been described, but the intermittent photography when a culture specimen or the like is used as the subject can be similarly performed.

[0017]

[Effect of the device]

 As described above, since the microscope photography apparatus according to the present invention is provided with the film end detection means and the optical path switching means, the number of remaining films in the camera back is less than the set number of pictures when auto bracketing is performed. Even in this case, continuous shooting can be performed in a short time without interrupting the camera back automatically. Moreover, it is possible to realize an inexpensive device having a relatively simple structure.

[Brief description of drawings]

FIG. 1 is an optical path diagram of a microscope photography apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram of an exposure control unit according to the embodiment.

FIG. 3 is a flowchart showing an auto bracket shooting sequence according to an embodiment.

[Explanation of symbols]

 1 Specimen 9 Optical Path Switching Prism 10 First Camera Back 11 Second Camera Back 17 Film End Detection Means 20 Winding Drive Switching Section

Claims (1)

[Scope of utility model registration request] 1. An auto-bracket function capable of switching a camera optical path to any of a plurality of camera backs and continuously shooting while changing an exposure value based on a plurality of input exposure correction values. In a microscope photographic device, a film end detection means for detecting that the number of remaining films in the camera back whose camera optical path is selected is 0, and another film end detection means when the film end is detected by the film end detection means A photographic device comprising a camera back and a switching means for switching an optical path so that when the film end is detected, the camera back is switched so that continuous shooting can be continued.