JPS6259938A - Device capable of photographic footprint material and restoration to actual size on photographic paper - Google Patents

Abstract

PURPOSE:To attain various purposes accurately by photographing a material from below and making the image erect through reflecting mirrors at two positions, and installing a camera and a restoring machine at plane poistions close to the photographed material. CONSTITUTION:There is an opening window 2 at the center part of the top surface of a box 1 as a principal body and a glass plate 3 is fitted thereto. Illumination lamps 4 such as fluorescent lamps are provided on both front and rear sides of the opening window 2 to light the opening window 2 uniformly. A large-sized surface reflecting mirror 5 is mounted at 45 deg. vertically below the opening window 2, a box 8 which has a 45 deg. slanting surface 6 is fitted to the lower part of the front surface of the box 1 facing the mirror, and a small-sized surface reflecting mirror 7 is fitted on the internal surface of the slanting surface 6 opposite the large-sized surface reflecting mirror 5. Then, the lens barrel 11 which incorporates a polarizing filter 9 and a photographic lens 10 is mounted vertically above the small-sized surface reflecting mirror 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a device for creating identification materials by photographing footprints taken from a crime scene.

Site footprints can be roughly divided into two types: two-dimensional footprints that are impressed on the floor, etc., and three-dimensional footprints that are pressed into the earth and sand of fields, construction sites, etc.

What is generally known is three-dimensional footprints, which are collected by pouring plaster or special plastic into them. Planar footprints are made by transferring footwear or bare feet that have been pressed by dirt powder etc. onto the floor or tatami mat surface onto a transparent footprint transfer film, photographing the footwear itself under certain conditions, and then using the negative film to further capture the image.
It creates accurate, full-size prints of footprints.

(B) Prior Art Conventionally, three-dimensional footprints are photographed using a general copying device for photographing footprint materials.

(1) In the case of three-dimensional footprints (gypsum type) or footwear itself, place the photocopy table on the copying table so that the photographic reference plane, that is, the virtual plane that includes three or more vertices of the convex parts, is level with respect to the unevenness of the material surface. to be installed.

This work requires very complicated means, and the accuracy of the reference plane is low, making it increasingly difficult to install the object, especially in the case of unstable objects such as boots.

(2) In the case of flat footprints, it is relatively common to photograph the footprint transfer film using transparent light.In this case, a light source lamp and camera are set up around the material, so the setup is extremely complicated. Become.

(3) When photographing footprint materials, scale markings are also imprinted on the materials to increase the value of proof in court. This scale is imprinted using a general black line scale on a white background and a white line scale on a black background, but since the color and density of the footprints at the site are different, when the exposure is adjusted to this, both scales become clearer. There are many things that cannot be captured.

(4) Conventionally, when creating a full-size footprint print from photographed film, the negative film is printed using a general enlarger, adjusting the imprinted scale to match the original size. The operation is complicated and the accuracy of restoration to original size is low.

(・→ Problems to be Solved by the Invention (1) If three-dimensional materials such as gypsum footprints or footwear themselves are photographed from above as in the past, it becomes complicated to set up the materials, so it is difficult to set up the materials on a horizontally installed glass plate. By placing the material and photographing it from below, three or more high parts of the footprint surface will be in contact with the glass plate and stabilized, making it possible to instantly determine the reference surface for photographing the material.

(2) In the case of flat footprints, use the following two methods.

Sort the image and photograph the impression of the footprints in the sand with clear contrast.

B. If the density of the transferred soil is so light that a clear footprint impression cannot be obtained even with a black film or sheet, place a transparent film or sheet on the surface of the soil transfer and take a photograph using transmitted light to obtain a clear impression. make an impression. This method is called oblique ray transmission detection.

(3) In order to sharpen the scale scale that is imprinted at the same time as the material, a polarizing film-treated scale and a polarizing filter are attached to the photographic lens side, and by adjusting the rotation angle, the scale can be clearly imprinted. .

(4) When creating a full-size footprint print from a photographed film, the optical mechanism of this device is used as is to create an accurate full-size print.

B) Means for Solving the Problems An embodiment of the present invention as a device for converting footprints collected at the site into footprint data for identification will be described below with reference to the drawings.

As shown in the figure, there is an opening window 2 in the center of the upper surface of the main body and the bow box 1.
There is a glass plate 3 attached to this. Illumination lamps 4 such as fluorescent lamps are provided on both sides of the opening window 2, so that the opening window 2 can be evenly illuminated.

A large surface reflecting mirror 5 is attached vertically below the opening window 2 at an angle of 45 degrees, and a box 8 with a 45 degree inclined surface 6 is attached to the front lower part of the box 1 opposite to this. A small surface reflecting mirror 7 is attached to the inner surface of the mirror 6 and opposes the large surface reflecting mirror 5. A lens barrel 11 containing a polarizing filter 9 and a photographic lens 10 is mounted vertically above the small surface reflecting mirror 7.

As shown in FIG. 2, the upper end of the lens barrel 11 becomes a connection mount 13 that can be joined to the camera body 12, and the camera body 12 or a small enlarger (restorer) 14 can be attached to and detached from this as desired. ing. A slot 15 is cut in the lower part of the lens barrel 11, and a rotary lever 16 connected to the frame of the polarizing filter 9 inside can be rotated 90 degrees through the slot 15.

Mounting seats 18 are provided in the center of both the left and right rows of the main box 1 to mount a lighting device (Z, light) 17 for transmitting light photography.

The structure of the compact enlarger 14 (restorer), which prints (enlarges) the negative film photographed by this device onto photographic paper and enlarges it to its original size, is as shown in FIG. The lens is attached to a mount 19 having the same shape as the mount, and can be joined to the upper mount 13 of the lens barrel section 11.

To install the mount 19, there is a slit hole 21 for inserting the film at a position above the surface 20 by the camera's mechanical puncture MB (the distance from the surface to the film surface for camera lens installation), and the upper part of the slit hole 21 is for condensing light. A negative film restoring machine 14 is provided with condenser lenses 22 and 23 degrees and a light source lamp 24 for enlargement.

The scale 25 that is imprinted at the same time as the footprint material is white, milky white, or transparent, as shown in Figures 8 and 9, in order to prevent surface reflection of the scale itself and to have a density that adapts to the brightness of the footprint material. A polarizing plate 28 is mounted on the upper surface of a scale 27 that is graduated on a scale substrate 26, and the polarization direction is in the A-B direction with respect to the scale line and in the direction C-D at 90 degrees with respect to this. . These objects with different polarization directions are used individually in a frame shape as shown in FIG. 6, or as a general sashimi shape as shown in FIG. 7, and are photographed at the same time as footprint materials.

(E) Operation When photographing three-dimensional footprint materials (including the footwear itself) with this device, turn on the internal illumination lamp 4 and place the material 29 and scale 25 downward on the glass plate 3 as shown in FIG. When the image is placed on the camera, the photographing reference plane is immediately determined, and the image is reflected twice by the large surface reflector 5 and the small surface reflector 7 installed at 45 degrees, and then passes through the polarizing filter 9 of the lens barrel 11. The image reaches the photographic lens 10 and is formed on the film surface 33 of the camera 12.

The photographic lens 10 is a macro type lens with a sufficient
If the focal length of the lens 1.0 is fixed to give a close-up magnification of 1/10), a subject up to 24 cm x 36 cm can be photographed using a 35 mm eye reflex camera.

The size of footprints is usually about 22cm to 30cr11, and even extremely large footprints are within 35an.

When photographing a two-dimensional footprint, in the case of a footprint transfer film with a high density, a black film sheet is placed on the transfer surface and placed on the glass plate 3 with the transfer surface facing downward, and the image is photographed in the same manner as in the case of three-dimensional footprints.

In the case of a plane footprint with a light density, a transparent film sheet is applied to the transfer surface, placed on the glass plate 3, and Z and lights 17 are attached to the lighting fixture mounting seats 18 on both sides of the box 1.
Transparent illumination is performed from above the material 32 using a lamp 31, and photographing is carried out in a state in which the clearest image is detected by variously adjusting the irradiation angle of the light and viewing from the viewfinder 30 of the camera.

In order to optimize the scale imprint density for the various shooting methods mentioned above, the lens barrel 1 is
When the lever 16 of the polarizing filter 1 is rotated to change the intersection angle between the polarizing axis of the polarizing filter 9 and the polarizing axis of the scale polarizing coating 28 to match the density of the scale to the density of the footprint material and take a photograph, the image becomes clearer. It is possible to imprint on a large scale. As shown in Figure 6, if you use a scale 25 that is assembled into a frame with alternating polarization axes, the scale on either two sides can be particularly clearly captured, and in the case of transmission photography, the scale substrate It is more effective if 26 is transparent.

This polarizing scale can also be used for general photography by applying a polarizing filter to the lens side (on the lens side) to capture a clear scale image.

To print a full-size print from the footprint negative film photographed as described above, the camera body 12 and restoring device 14 must be replaced as shown in FIG. Insert the negative film into the
When the light source lamp 24 is turned on, a full-sized footprint image is projected onto the glass plate 3. Since the image of the negative film is formed on the glass plate 3 using the same optical path as when photographing, it is possible to accurately reproduce the original size of the photographed material 29 on the photographic paper 32.

A feature of the restorer is that the distance (MB) from its mounting surface 20 to the negative film surface is the same distance as the mechanical bank (MB) of the camera body 12, so the camera body 12 and restorer 14 are exchanged. With just a few simple operations, you can take photos of materials and restore and print them on photographic paper.

As mentioned above, this device photographs materials from below, uses two reflecting mirrors to erect the image, and installs the camera and reconstruction device in a plane position relatively close to the photographed materials, so that the materials and camera are Can be easily handled and operated by one person.

Since the conventional method is a general method of photographing directly from above, the camera is installed at a position considerably higher than the floor, so it is necessary to use a stepladder, etc., and rely on others to move and set up the materials. It was an inconvenience.

As described above, this device is capable of efficiently and accurately processing a variety of purposes, and is capable of photographing footprint materials and restoring them to original size on photographic paper.

[Brief explanation of the drawing]

The drawings show an embodiment of a device according to the present invention that can take images of footprints and restore them to their original size on photographic paper; FIG. 1 is a perspective view of the device; FIG. Figure 3 is a longitudinal sectional view of the restoring machine, Figure 1 is a side view showing the optical mechanism for photographing materials, Figure 5 is a side view showing the optical mechanism for restoring onto photographic paper, and Figures 6 and 7. 8 is a plan view showing the external appearance of the scale, and FIGS. 8 and 9 are perspective views showing the structure of the concentration adjustment scale used in conjunction with the present apparatus. 1... Main box, 2... Opening window, 3... Glass plate, 4... Lighting rung, 5... Large surface reflecting mirror, 6
... Inclined surface, 7 ... Small surface reflector, 8 ... Box,
9...Polarizing filter, 10...Photography lens,
11... Lens barrel, 12... Camera body, 13.
...Connection mount, 14...Restorer, 15...Slot hole, 16...Rotary lever, 17...Lighting device (Z, light), 18...Mounting seat, 19... restorer mount,
20...Bottom surface of mount, 21...Film insertion slit hole, 22.23-@good condenser lens, 24ψ
・Fist light source Rump', 25-Fist scale, 26・-・
Scale substrate, 27... Scale graduation, 28... Polarizing coating, 29 Urn ψ footprint material, 30-... Finder, 3
1... Transmitted illumination lamp, 32... Photographic paper, 33...
・Film, MB...-Mechanical back distance, no change in the dimensions of the drawing) 5vA December 9, 1985

Claims (1)

[Claims] 1. The central part of the top surface of the box (1) becomes an opening window (2), a glass plate (3) is attached to this, and there is an illumination lamp (5) that illuminates this from both the front and back sides, 4 for glass plate (3)
A large surface reflector (5) with a 5 degree angle is attached to a glass plate (3).
), and a small surface reflector (7) is mounted on the front side of the box (1) at an angle of 45 degrees along with the box (8) and is rotatable on the top side of the box (1). A camera body (12) and a restoring device (14) are attached to the top of the lens barrel (11). The restoration machine (14) has condenser lenses (22), (23) and a light source lamp (24) inside the cylinder.
is attached, a film insertion hole (21) is provided on the side, and its position is from the bottom surface (20) of the camera body (1).
It is located at the same distance as the mechanical bag (MB) (2), and on both sides of the main box (1) there are lighting devices (
17) is equipped with a mounting seat (18) for attaching it to the device that allows for photographing and restoration to original size. 2. The scale to be imprinted with the material is a scale board (26
) Polarizing coating (28) on the surface of the scale scale (27)
There are two types of polarization directions: A-B and C-D direction perpendicular to this, and the scale shape is also frame-shaped (2
5) Or scale substrate (2
6) Photography scales that improve the imprinting effect by using white, milky white, transparent, and other various colors.