JPH05100171A - Photograph enlarger - Google Patents

Abstract

PURPOSE:To obtain a photograph enlarger whose operation is easy at low cost. CONSTITUTION:A vertically moving device 4 is attached to the column 2 of a stand 1, so as to vertically adjust the position of a supporting base 6. The supporting base 6 rotatively supports a converter 7, and plural objective lenses 8 having different focal lengths are attached to the converter 7. A lens-barrel 9 is mounted on the supporting base 6, and the body of a 35mm single-lens reflex camera is mounted thereon. Then, an X-Y table 15 moved by a micrometer screw 16 is installed on the stand 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for taking a magnified photograph of a subject.

[Prior Art]

Conventionally, there is a microscope equipped with a camera so that high-magnification photographs can be taken. However, in order to attach a camera to a microscope, an eyepiece for a camera is required in addition to the original eyepiece, the structure is very complicated and expensive, and the operation is difficult. Actually, operations such as selection of illumination system, selection of filter, adjustment of aperture, adjustment of diopter, and focusing for photographing have only troubled unskilled persons. Further, when deciding a photographing range by looking through a monocular or binocular eyepiece lens, the work of framing a rectangle corresponding to a photographic film in a circular field of view is also confusing to an unskilled person. Furthermore, since it is an inverted image that can be seen through the eyepiece, when it is desired to move the field of view, the object to be observed must be moved in the opposite direction, which is difficult to use.

[0003]

SUMMARY OF THE INVENTION The present invention provides a magnifying picture taking apparatus which is inexpensive and easy to operate.

[0004]

The magnified photograph taking apparatus of the present invention comprises a body of a single-lens reflex camera, an objective lens, and
It consists of a lens barrel that connects the objective lens and the camera body, a mount for placing a subject, and a vertical movement device that adjusts the distance between the mount and the objective lens. Then, an image obtained by enlarging the subject with the objective lens is formed on the film surface of the camera.

In order to easily change the magnification, a converter can be rotatably supported on the tip of a lens barrel, and a plurality of objective lenses having different focal lengths can be attached to the converter. In order to easily measure the size of the part of the subject, the mounting table can be configured by an XY table with a micrometer screw.

[0006]

The principle of this apparatus is that, as shown in FIG. 1, the subject ab is placed slightly in front of the focal point f of the objective lens (convex lens) 8 and a magnified real image AB is formed behind the lens and on the film surface of the camera 10. Let The camera is a single-lens reflex camera, and the real image AB can be seen from the viewfinder 10a through the mirror 10c and the prism 10b. Since the image is inverted when passing through the prism 10b, the image seen from the finder becomes an erect image.

The focus is adjusted by adjusting the distance between the subject and the objective lens. An approximate magnification can be obtained by dividing the distance between the objective lens and the film by the focal length of the objective lens. For example, when the distance between the film surface and the objective lens is 150 mm and the focal length of the objective lens is 10 mm, a magnification of about 15 times can be obtained.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, a vertical movement device 4 is attached to a support 2 of a stand 1 with a set screw 3. When the vertical movement device 4 turns the dial 5, the support base 6 moves up and down by the action of the rack and pinion incorporated inside. The converter 7 is rotatably supported on the support base 6, and five objective lenses 8 having different focal lengths are attached to the converter 7.

The lens barrel 9 is attached on the support base 6, and the body 10 of the 35 mm single-lens reflex camera is attached to the tip thereof. This camera has an automatic exposure mechanism. Support base 6
A lighting device 11 is attached between the lens barrel 9 and the lens barrel 9. The lighting device 11 changes the light of the lamp 12 downward by the mirror 13.
The subject 14 is illuminated. Mirror 1
3 is semi-translucent, and light from the object can reach the camera through the mirror.

An XY table 15 is set on the stand 1. This table has two vertical and horizontal micrometer screws 16, and when this is turned, the table moves vertically and horizontally as shown by the chain line in the figure. The amount of vertical and horizontal movement of the table is
It can be read from the scale of the corresponding micrometer screw.

In use, the subject 14 is placed on the XY table 15, and the dial 5 of the vertical movement device 4 is operated while looking through the viewfinder 10a of the camera 10 to focus and release the shutter. To change the magnification, turn the converter 7 and select another objective lens 8. To change the magnification further, use another lens barrel having a different length. To move the field of view, turn the micrometer screw 16
-Move the Y table 15 vertically and horizontally. Since it is an erect image that can be seen from the viewfinder, the XY table can be moved in the direction in which the FOV is to be moved.

To measure the size (size in the vertical or horizontal direction) of a certain part of the subject, one end of the part is aligned with the center line of the finder of the camera, and the scale of the micrometer at this time is read. Then turn the micrometer screw,
Align the other end of the part with the finder center line and read the micrometer scale again. The size of the part of the subject can be obtained as the difference between these two readings of the micrometer, that is, the distance traveled (or retracted) by the micrometer screw.

[0013]

In the apparatus of the present invention, the image magnified by the objective lens is formed on the film surface of the single-lens reflex camera, so that the photograph as seen by the viewfinder can be easily taken without any difficult operation. .. In particular, since there is no eyepiece, the structure is extremely simple and can be provided at low cost. Also, since the erect image is visible from the viewfinder of the camera, when moving the field of view, it suffices to move the subject in the same direction as the direction in which the field of view should be moved, which is easy to use.

If the converter is rotatably supported at the tip of the lens barrel and a plurality of objective lenses having different focal lengths are attached to the converter, the magnification can be easily changed. If the mounting table is composed of an XY table with a micrometer, not only the position of the object can be finely adjusted but also the amount of movement of the mounting table can be known by the micrometer, so that the size of the object can be easily read.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the principle of a magnified photograph taking device.

FIG. 2 is likewise a front view.

FIG. 3 is likewise a side view.

[Explanation of symbols]

 4 Vertical movement device 7 Converter 8 Objective lens 9 Lens barrel 10 Camera body 14 Subject 15 XY table (mounting table) 16 Micrometer screw

Claims (3)

[Claims] 1. A body (10) of a single-lens reflex camera,
The objective lens (8), the lens barrel (9) connecting the objective lens and the camera body, the mount (15) for placing the subject (14), and the distance between the mount and the objective lens are set. An up-and-down photographing device comprising an up-and-down moving device (4) for adjusting, and an image obtained by enlarging the subject with the objective lens is formed on a film surface of the camera. 2. The magnified photography apparatus according to claim 1, wherein a converter (7) is rotatably supported at the tip of the lens barrel, and a plurality of objective lenses having different focal lengths are attached to the converter. 3. The mounting table has a micrometer screw (16).
The magnified photograph taking apparatus according to claim 1 or 2, which is configured by an XY table that moves by.