JPH11223851A - Fingerprint photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fingerprint photographing device excellent in workability and capable of easily photographing a fingerprint regardless of a plane object or a solid object. SOLUTION: The main body of a hood for photographing a finger-print 7 provided with a semicylindrical curved late part 9 having an axis orthogonal to the optical axis of a camera 1, presenting dome shape and constituted by boring a hole for photographing 11 at an optical axis position is detachably attached to the front of the camera 1 in an optical axis direction. A pair of stobe light emission parts 12 and 12 emitting light while being interlocked with the actuation of the shutter of the camera 1 is attached in the hood 7 so that an irradiating light direction can be adjusted. Then, a camera supporting mechanism 19 is constituted so that a supporting axis leg 20 elastically urged in a forward projecting direction is pivotally inserted in plural supporting shaft leg attaching members 22 fixed on the hood 7 so as to freely get in/out, and is fixed at the desired projecting position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint photographing technique in a police agency, and more particularly to a fingerprint photographing apparatus excellent in photographing a fingerprint image from a three-dimensional object.

[0002]

2. Description of the Related Art At present, as a method of detecting a fingerprint in a Japanese police agency (discrimination), there is a method of attaching fine aluminum powder to a fingerprint and transferring the fingerprint to a gelatin sheet. Since it is not possible to detect fingerprints attached to envelopes, documents, paper such as banknotes, gum tape, vinyl sheets, etc., special reference light such as fluorescence and reflected light from fingerprints is detected using chemicals. ing.

In this method, a drug such as rhodamine 6G, DFO, ninhydrin, or cyanoacrylate is applied to a seized material from a crime scene to react with an amino acid contained in a human fingerprint. Is a method in which a fingerprint of the reaction product is hardly visible under visible light, so that the fingerprint is visualized by irradiating the fingerprint of the reaction product with light of a specific wavelength range, and the ultraviolet reflection of the fingerprint is photographed.

[0004]

However, to date, the FBI (U.S.A.) has been generalized in its investigations, but it has not yet penetrated deeply into Japanese police agencies. In addition to the diversification of fingerprints, in addition to the detection of fingerprints, it will be possible to detect blood, bodily fluids, smoke from handguns, finely painted pieces, etc. It is supposed to be. For this reason, in order to respond to changes in the forensic investigation method in the future, it is desired to develop a fingerprint photographing apparatus compatible with a new fingerprint detection method.

Accordingly, the present invention makes it possible to visualize a fingerprint by irradiating a fingerprint of the reaction product with light in a specific wavelength range, to take an image of the ultraviolet reflection of the fingerprint, and to distinguish between a flat object and a three-dimensional object. It is an object of the present invention to provide a fingerprint photographing apparatus which is excellent in workability and can easily photograph a fingerprint regardless of the situation.

[0006]

That is, a fingerprint photographing apparatus according to the present invention has a dome shape which is detachable in front of an optical axis of a camera and has a semi-cylindrical curved plate portion having an axis perpendicular to the optical axis. A fingerprint photographing hood body in which a photographing through hole is formed at the optical axis position, and an irradiation light direction adjustable in each of the fingerprint photographing hoods, and the light is emitted in conjunction with the shutter operation of the camera. A pair of strobe light emitting portions, and a plurality of supporting shaft legs attached members fixed to the fingerprint photographing hood, the supporting shaft legs elastically urged in the forward protruding direction are respectively axially inserted and retracted, And a camera supporting mechanism capable of fixing the supporting shaft leg at a desired projecting position.

The strobe light emitting portion is pivotally mounted so that its optical axis is slidably displaced along an arcuate guide rail centered on the center of curvature of the cylindrical curved portion of the fingerprint photographing hood body. An angle adjusting screw shaft protruding from the back of the strobe light emitting portion projects from a slit formed in a circumferential direction of the cylindrical curved plate portion, and a strobe fixing knob is screwed onto the angle adjusting screw shaft to displace in a sliding direction. Can be implemented by a structure that fixes

In the camera support mechanism, a rod extending from a rear end of the support shaft leg is inserted into a rod insertion hole formed in a rear wall of the slide shaft hole of the support shaft leg mounting member, and a coil externally inserted into the rod. The gist of the invention is that the spring is elastically mounted between the sliding shaft hole and the rear wall, and the clamp screw screwed to the supporting shaft leg mounting member is fastened toward the supporting shaft leg. .

It is desirable that the camera is an instant camera capable of obtaining a positive photograph immediately after photographing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a fingerprint photographing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway front view of the fingerprint photographing apparatus,
Reference numeral 1 denotes an instant camera capable of obtaining a positive photograph immediately after photographing. The instant camera 1 has a structure in which an instant film 5 is provided at a focal position of a lens group 4 arranged in series on an optical axis L1 of the camera, which is located on the front surface of a body 3 having a grip 2 protruding on one side. ,
The front subject is photographed on the surface of the instant film 5 by a structure such as an aperture and a shutter (not shown). A front plate 6 is fixed to the front of the body 3.

Reference numeral 7 denotes a fingerprint photographing hood fixed to the front surface of the instant camera 1, and has a structure in which the substrate portion 8 of the fingerprint photographing hood 7 is detachably attached to the front plate 6 of the instant camera 1. . The fingerprint photographing hood 7 is substantially constituted by a cylindrical curved plate portion 9 whose hood body has an axis perpendicular to the optical axis L1 of the instant camera 1, and both side plate portions 10 and 10 covering both ends of the semi-cylindrical shape. It has a semi-cylindrical dome shape, and a through hole 11 for imaging is formed at the optical axis position of the substrate portion 8.

Further, a pair of strobe light emitting portions 12, 12 are attached to the fingerprint photographing hood 7 so that the irradiation light direction can be adjusted. Each of the strobe light emitting portions 12 has a light emitting bulb 13 and a reflecting mirror 14 incorporated therein so that an optical axis L2 is directed to a center of curvature O on the optical axis L1 of the cylindrical curved plate portion 9, and is configured on the side plate portion 10. It is pivotally provided so as to be slid and displaced (arrow AB) along the arcuate guide rail 15 having the curvature center O as a center.

Reference numeral 16 denotes a slit 1 protruding from the back of the strobe light emitting portion 12 and formed in the circumferential direction of the cylindrical curved plate portion 9.
The strobe fixing knob 18 screwed to the angle adjusting screw shaft 16 can be fixed to the displacement in the sliding direction. The two strobe light emitting units 12 receive power supply from a known control power supply unit (not shown), and emit light in response to an “ON” signal of a switch circuit linked to the shutter device of the instant camera 1.

Reference numerals 19 and 19 denote camera support mechanisms provided on both side plates 10 and 10 of the hood 7 for photographing fingerprints, respectively. Each camera support mechanism 19 includes a support shaft leg 2.
A rod 23 extending from the rear end of the support shaft leg 20 is inserted into a rear wall of the slide shaft hole of a support shaft leg mounting member 22 having a slide shaft hole 21 in which a shaft 0 is slidably inserted. A hole 24 is bored, and a coil spring 25 externally inserted into the rod 23 is elastically mounted between the sliding shaft hole 21 and the rear wall. Do it.

The support shaft leg 20 includes a coil spring 2
5 is elastically urged in the direction in which it protrudes at all times, and is screwed to the support shaft leg attachment member 22.
Can be fixed at a predetermined projecting position, and can also be fixed at a completely retracted position.

In the fingerprint photographing apparatus having the above structure, when the subject whose fingerprint is to be photographed is an envelope, a document, flat paper such as a bill, or a flat surface such as a table or a board surface,
As shown in FIG. 3, the support shaft leg 20 is completely pushed into the support shaft leg attachment member 22 against the elasticity of the coil spring 25, and the clamp screw 27 is fastened for use.

When the support legs 20, 20 are completely retracted, the surface H on which the flat subject a is placed and the end surface 28 of the fingerprint photographing hood 7 can be set on the same surface.
The optical axis L2 of each of the strobe light emitting portions 12, 12 radiated toward the center of curvature O of the cylindrical curved plate portion 9 irradiates the subject a. At this time, even if the strobe fixing knob 18 is loosened and the strobe light emitting unit 12 is changed along the arcuate guide rail 15 (arrow AB), the irradiation position on the subject a does not shift only by changing the irradiation angle. Absent.

Therefore, both strobe light emitting portions 1
The reflected light in the direction of the optical axis L1 of the instant camera 1 is adjusted while independently changing the angles of 2 and 12.
After tightening the flash fixing knob 18 at a position adjusted so as to obtain the most preferable reflected light, the reflected light from the subject a is photographed by operating the instant camera 1 in the same manner as a normal photographing operation.

As shown in FIG. 1, when the subject a whose fingerprint is to be photographed is a three-dimensional surface such as a glass, a vase or a trophy, the clamp screw 27 is loosened and the support shaft leg 20 is moved. It is used by projecting from the support shaft leg attachment member 22 by the elasticity of the coil spring 25.

An instant camera 1 having a grip 2
Is moved or / and inclined, and the center of curvature O of the cylindrical curved plate portion 9 is moved.
Is adjusted so that the intersection position of the two optical axes L2 and L2 of the two strobe light emitting units 12 and 12 irradiated toward the object coincides with the photographing position of the subject a, and then the clamp screw 27 is tightened. In this state, even if the strobe fixing knob 18 is loosened and the strobe light emitting unit 12 is changed along the arcuate guide rail 15 (arrow AB), the irradiation position of the subject a is shifted only by changing the irradiation angle. There is no.

Therefore, both strobe light emitting units 1
The reflected light in the direction of the optical axis L1 of the instant camera 1 is adjusted while independently changing the angles of 2 and 12.
The strobe fixing knob 18 is tightened at a position adjusted so as to obtain the most preferable reflected light, and the reflected light from the subject a is photographed by operating the instant camera 1 in the same manner as a normal photographing operation.

In this state, the camera support mechanisms 19, 19
Since the instant camera 1 is held by the supporting shaft legs 20, 20, the fluctuation of the camera can be reduced, and a good photographed image can be obtained. In the case of performing a plurality of photographing operations, the camera support mechanism 19 can eliminate the fluctuation of the distance to the subject a, and can eliminate the focusing operation for each photographing operation. Can be improved.

[0023]

As described above, the fingerprint photographing apparatus according to the present invention visualizes the fingerprint by irradiating the fingerprint of the reaction product with light in a specific wavelength range, and captures the ultraviolet reflection of the fingerprint. In the method, since the camera can be held by the camera support mechanism and wobble can be eliminated, a good photographed image can be obtained. In the case of performing a plurality of shootings, the camera support mechanism can eliminate the fluctuation of the distance to the subject, so that it is possible to omit the focusing operation for each shooting, and to improve the workability of the fingerprint shooting. it can.

Further, since the camera support mechanism can be completely retracted and used, even if the subject is a flat object, it is possible to immediately take a corresponding picture, and the optical axes of both strobe light emitting parts are always non-photographed. Because it is a structure that intersects with the surface of the object, it is possible to always obtain a good photographed image,
Irrespective of whether the object is a flat object or a three-dimensional object, it has a feature that a fingerprint can be easily taken, and the effect obtained by implementing the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a fingerprint imaging apparatus in a three-dimensional object imaging state according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the camera support mechanism.

FIG. 3 is a partially cutaway front view of the fingerprint imaging apparatus in a state where a flat object is imaged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instant camera 2 Grip 3 Body 4 Lens group 5 Instant film 6 Front plate 7 Hood for fingerprint photographing 8 Substrate part 9 Cylindrical curved plate part 10 Side plate part 11 Photography through hole 12 Strobe light emitting part 13 Light emitting valve 14 Reflecting mirror 15 Yen Arc guide rail 16 Angle adjusting screw shaft 17 Slit 18 Strobe fixed knob 19 Camera support mechanism 20 Support shaft leg 21 Sliding shaft hole 22 Support shaft leg attachment member 23 Rod 24 Rod insertion hole 25 Coil spring 26 Retainer ring 27 Clamp screw a Subject

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[Procedure amendment]

[Submission date] January 18, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

That is, a fingerprint photographing apparatus according to the present invention has a dome shape which is detachable in front of an optical axis of a camera and has a semi-cylindrical curved plate portion having an axis perpendicular to the optical axis. A fingerprint photographing hood body having a through hole for photographing at an optical axis position, and a curvature of a cylindrical curved plate portion of the fingerprint photographing hood body located in the fingerprint photographing hood, the optical axis of which is located inside the fingerprint photographing hood. A slit which is pivotally provided so as to be slidably displaced along an arcuate guide rail centered on the center, and has an angle adjusting screw shaft protruding from a back surface of the strobe light emitting portion formed in a circumferential direction of the cylindrical curved plate portion. A pair of strobes that project from the angle adjustment screw shaft and are screwed to the strobe fixing knob to fix the displacement in the sliding direction, are attached so that the irradiation light direction can be adjusted, and emit light in conjunction with the shutter operation of the camera. A light emitting unit and the fingerprint photographer A rod extending from the rear end of the support shaft leg is inserted through a rod insertion hole formed in a rear wall of the slide shaft hole of the plurality of support shaft leg attachment members fixed to the rod, and a coil spring externally inserted into the rod. Is provided between the sliding shaft hole and the rear wall, and a clamp screw screwed to the supporting shaft leg mounting member is fastened toward the supporting shaft leg. The gist of the present invention consists of a camera support mechanism in which support shaft legs elastically biased in the forward protruding direction are removably inserted into a shaft, and the support shaft legs can be fixed at a desired protruding position.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Deleted

Claims (4)

[Claims] 1. A dome shape having a semi-cylindrical curved plate portion having an axis perpendicular to the optical axis, which is detachable in front of an optical axis of a camera, and a through hole for photographing is formed at an optical axis position. A fingerprint photographing hood main body, a pair of strobe light emitting portions which are mounted in the fingerprint photographing hood so as to be capable of adjusting the irradiation light direction and emit light in conjunction with a shutter operation of a camera, A camera in which a plurality of support shaft legs elastically urged in a forward protruding direction are axially inserted into and retracted from a plurality of fixed support shaft leg attachment members, and the support shaft legs can be fixed at a desired protruding position. A fingerprint photographing device comprising a support mechanism. 2. The electronic flash unit according to claim 1, wherein the strobe light emitting unit is pivotally mounted such that an optical axis thereof is slidably displaced along an arcuate guide rail centering on a center of curvature of a cylindrical curved plate portion of the fingerprint photographing hood body. An angle adjusting screw shaft protruding from the back of the strobe light emitting portion projects from a slit formed in a circumferential direction of the cylindrical curved plate portion, and a strobe fixing knob is screwed onto the angle adjusting screw shaft to displace in a sliding direction. 2. The fingerprint photographing apparatus according to claim 1, wherein said fingerprint photographing apparatus is fixed. 3. The camera support mechanism inserts a rod extending from the rear end of the support shaft leg into a rod insertion hole formed in a rear wall of the slide shaft hole of the support shaft leg mounting member, and inserts the rod into the rod. Wherein the coil spring is elastically mounted between the sliding shaft hole and a rear wall of the sliding shaft hole, and a clamp screw screwed to the supporting shaft leg mounting member is fastened toward the supporting shaft leg. 3. The fingerprint imaging device according to 1 or 2. 4. The fingerprint photographing apparatus according to claim 1, wherein said camera is an instant camera capable of obtaining a positive photograph immediately after photographing.