JPH10232434A - Short distance photographing camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent discrimination between an object and a background from being disturbed and to clearly show the contour of the object by preventing an arbitrarily selected xenon lamp from emitting light, at the time of executing photographing. SOLUTION: The xenon lamp 4 in a position where the emission of the light is not executed is arbitrarily selected by a light emitting mode switching lever. When an operator selects the position for the nonemission of the light by the switching lever 2 for changing over a light emission mode, the selected signal is outputted to a switching circuit. The switching circuit selects one of the circuits of the respective arranged xenon lamps 4, to output the signal from a light emission signal generating circuit, to the trigger circuit of the selected circuit. The selected trigger circuit outputs the signal to a light emission circuit at the timing of a shatter, to make the xenon lamp 4 emit the light. Since the xenon for making the quantity of the light reflected from the background part of the object at the time of emitting the light large is selected not to emit the light, a photograph where the background is clearly discriminated from the object is taken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a close-up camera in which a plurality of xenon lamps are arranged around a macro lens and a plurality of xenon lamps emit light simultaneously to perform close-up shooting.

[0002]

2. Description of the Related Art Conventionally, when performing shadowless close-up photography,
One ring-type xenon lamp is arranged on the lens, the lens and the camera are integrated, and the xenon lamp emits light simultaneously with photographing of the camera to perform close-up photographing.

[0003]

However, in such a camera, the length of the xenon lamp and the diameter of the xenon lamp are increased, which causes the luminous efficiency to relatively deteriorate with respect to the input energy. On the other hand, such a xenon lamp can perform shadowless imaging, but when a certain degree of shadow is required, for example, when photographing a tooth at a dentist, even if the tooth is in focus, it is located behind the tooth. Some saliva and the emitted light are reflected, and the outline of the teeth is blurred and becomes the same as the background. There was no other way but to block and shoot.

The present invention has been made in order to solve such a conventional problem. In close-up photography, a xenon lamp can be reduced in size, and a subject and a background caused by emission and reflection of the xenon lamp can be reduced. Is characterized by providing a close-up photographing camera that eliminates the inability to discriminate and can clearly capture the outline of the subject.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been arbitrarily selected in a close-up photographing camera in which a plurality of xenon lamps are arranged around a lens in a lens barrel capable of close-up photographing. The xenon lamp is configured to emit no light during photographing. As a result, the amount of reflected light in the background is reduced, and a certain degree of shadow is formed on the subject, so that the outline is clearly displayed.

[0006] When the plurality of xenon lamps emit light at the same time, a xenon lamp in which the amount of reflected light from an object other than the subject increases may be selected so as not to emit light. This further reduces the amount of reflected light entering the lens from the background portion, so that the background portion and the subject can be clearly distinguished.

[0007]

1 to 3 show an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a diagram showing a configuration of a close-up camera showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of a strobe light emitting circuit for emitting a xenon lamp of the present invention, and FIG. FIG. 9 is a diagram for explaining the photographing principle at the time.

As shown in FIG. 1, reference numeral 1 denotes a camera body. Reference numeral 2 denotes a light emission mode switching lever according to the present invention, which allows one of the xenon lamps 4 described later to emit no light. That is, it is possible to arbitrarily select which position of the xenon lamp 4 is to be turned off by the lever. Numeral 3 denotes a lens barrel, in which a macro lens 5 is arranged inside, and a straight tube type xenon lamp 4 is arranged around the macro lens 5, so that it has a clean structure as a whole.

As shown in FIG. 2, when the operator selects a non-light emitting position by the switching lever 2 for switching the light emitting mode as shown in FIG. The selected signal is output, and the switching circuit 7 selects the circuit of the xenon lamp 4 in which the signal from the light emission signal generating circuit 6 is arranged and outputs the signal to the trigger circuit 8. The selected trigger circuit 8 outputs a signal to the light emitting circuit 9 at the timing of the shutter to cause the xenon lamp 4 to emit light.

The position where the xenon lamp 4 is set to emit no light can be arbitrarily determined. It may be determined according to the operator's intention.
Further, when the xenon lamp 4 emits light at the same time, the xenon lamp 4a increases the amount of light reflected from other than the subject.
May be set to no light emission. That is, as shown in FIG. 3, the light from the xenon lamp 4b is mainly reflected on the teeth 10 and enters the macro lens 5, but the light from the xenon lamp 4a is mainly the background behind the teeth 10 (saliva or tongue). The light is reflected by the light 11 and enters the macro lens 5.

As a result, since the teeth 10 are white, the three-dimensional effect cannot be obtained because the teeth 10 match the reflected light of the background 11, but the operator operates the xenon lamp 4a having a large amount of reflected light of the background 11 with the switching lever 2 to emit no light. As a result, the shadow 12 of the teeth 11 is formed, and a three-dimensional photograph can be taken.

However, although there are various methods for selecting the xenon lamp 4a having a large amount of reflected light from the background 11, the operator takes an image of all the xenon lamps 4 one by one without emitting light.
By remembering the best position for taking the image, the photographing angle, and the like, it is possible to take a three-dimensional image by simply operating the switching lever 2 for the next photographing.

It is also possible to detect the amount of reflected light of the image and its background with a sensor, calculate each amount of reflected light, and automatically turn off the xenon lamp 4, but the invention is not limited thereto. Absent.

[0014]

According to the above-described structure, since a plurality of xenon lamps are arranged around the lens, it is compact, not only does not give a sense of incongruity even when photographing near, but also emits light from various angles. Since light can be emitted, it is possible to take a photograph having a partial shadow intended by the photographer. In addition, by selecting a xenon lamp that emits a large amount of light from the background portion of the subject when it is made to emit light from among the plurality of xenon lamps and not emitting light, the reflected light entering the lens from the background portion is further reduced. This has a remarkable effect that the amount of light is reduced and a photograph in which the background and the subject are clearly distinguished can be taken.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a close-up photographing camera showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a strobe light emitting circuit for emitting a xenon lamp according to the present invention.

FIG. 3 is a view for explaining the principle of photographing when the dentist of the present invention photographs a tooth.

[Explanation of symbols]

 1: Camera body 2: Switching lever 3: Lens barrel 4: Xenon lamp 5: Macro lens 6: Light emission signal generation circuit 7: Switching circuit 8: Trigger circuit 9: Light emission circuit 10: Teeth 11: Background 12: Shadow

Claims (2)

[Claims] In a close-up photographing camera in which a plurality of xenon lamps are arranged around a lens in a lens barrel capable of close-up photographing, the arbitrarily selected xenon lamp is configured not to emit light when photographing. A close-up camera. 2. The apparatus according to claim 1, wherein when the plurality of xenon lamps emit light at the same time, a xenon lamp in which the amount of reflected light from a portion other than the subject increases is selected so as not to emit light. Close-up camera.