JP3080256U - Lighting equipment for photography - Google Patents

Abstract

(57) [Problem] To provide a photographic lighting device improved so as not to cause uneven brightness. SOLUTION: On a lamp-side half of a diffuse reflector (11), a specular reflector (9) adhered leaving a part adjacent to a lamp (6) is provided, and an upper half of a housing (3) is provided. The portion adjacent to the lamp (6) in (1) is two inclined surfaces (1a, 1b) having different inclination angles, and a part of a mirror reflector located around the lamp is positioned on the inclined surface. Is reflected toward the diffuse reflector and the specular reflector above it.

Description

[Detailed description of the invention]

[0001]

[Field to which the invention belongs]

 The present invention relates to a photographic lighting device, and more particularly, to a photographic lighting device used to shine light from below on a negative film or a positive film in order to chuck the film.

[0002]

[Prior art]

 This type of photographic lighting device is generally called a light box, and is in a small and thin form so that it can be easily carried. The light box is structurally composed of a plastic housing 3 formed by screwing an upper half 1 and a lower half 2 and a top of the upper half 1 as shown in a sectional view in FIG. Milky white translucent acrylic plate 5 attached to the window 4 of the vehicle, a lamp 6 attached to one end of the housing in the housing, and formed under the acrylic plate and integrally with the lower half 2 of the housing. And a specular reflector 9 supported on the curved surface 8 of the support rib 7 and a specular reflector 10 mounted on the inner surface of the housing around the lamp. Another form of the light box has the same structure as the light box shown in FIG. 3 except that the white diffuse reflection plate 11 is supported by the curved surface 8 of the support rib 7 as shown in FIG. .

[0003]

[Problems to be solved by the invention]

 In the form of the light box shown in FIG. 3, light from the lamp 6 is reflected by the specular reflection plate 9 and travels toward the acrylic plate 5, but as the distance from the lamp 6 increases, the angle of incidence on the acrylic plate increases. Therefore, light was reflected by the acrylic plate, and the brightness of the upper surface of the acrylic plate was reduced, resulting in darkness. Due to the reflection of light on the specular reflectors 9 and 10, light reflected on the upper part of the specular reflector 10 is again reflected on the specular reflector 9 and illuminates the acrylic plate. There was also a disadvantage that the brightness was increased, causing uneven brightness on the top surface of the acrylic plate.

In the form of the light box shown in FIG. 4, light from the lamp 6 is diffusely reflected by the diffuse reflection plate 11, so that even if the distance from the lamp increases, the light having a large incident angle among the diffused light. Has the effect of increasing the brightness of the upper surface of the acrylic plate, but the reflection of light by the diffuse reflection plate 11 and the specular reflection plate 10 acts to reduce the area of the acrylic plate close to the lamp as in the light box of FIG. There was a drawback that the brightness was increased and uneven brightness was generated on the upper surface of the acrylic plate.

It is an object of the present invention to provide a photographic lighting device improved so as not to cause uneven brightness.

[0006]

[Means for Solving the Problems]

 The object of the present invention is to provide a plastic housing composed of upper and lower halves screwed together, a milky translucent acrylic plate attached to a window at the top of the upper half, A lamp mounted at one end in the housing, a diffuse reflector under the acrylic plate and supported by curved surfaces of support ribs formed integrally with the lower half of the housing; And a specular reflector attached to the inner surface of the housing around the reflector, the specular reflector bonded to the diffuser reflector on the lamp-side half, leaving a part adjacent to the lamp. A portion adjacent to the lamp in the upper half of the housing is formed as two inclined surfaces having different inclination angles, and a part of a mirror reflector located around the lamp is positioned on the inclined surface. Reflector that diffuses light from It is accomplished by providing a photographic lighting apparatus as feature that is reflected toward the beauty the specular reflector thereon.

[0007]

[Action]

 The light from the lamp is directly diffusely reflected by the diffuse reflector, and is reflected by the mirror reflector on the diffuse reflector and the mirror reflector provided on the inner surface of the housing around the lamp. Some of the light reflected by the upper specular reflector hits the specular reflector on the diffuse reflector and is reflected toward the acrylic plate, and some of the light reflected by the diffuse reflector is reflected toward the acrylic plate. I do. As a result, the luminance in the acrylic plate region far from the lamp can be relatively increased, and the luminance in the periphery of the lamp can be relatively reduced, so that the luminance unevenness over the acrylic plate can be improved.

[0008]

[Embodiment of the invention]

 Referring to the drawings, a photographic lighting device according to the present invention is mounted on a plastic housing 3 formed by screwing an upper half 1 and a lower half 2 and a window 4 on the top of the upper half 1. Milky white translucent acrylic plate 5, a lamp 6 attached to one end of the housing within the housing, and a support rib 7 below the acrylic plate and formed integrally with the lower half 2 of the housing. A diffuse reflector 11 having a specular reflector 9 supported on the lamp side half and glued on the lamp side half leaving a portion 11 'adjacent to the lamp, and an upper half of the housing around the lamp and And specular reflectors 10a and 10b respectively attached to the inner surface of the lower half. The diffuse reflection plate is preferably, but not limited to, made of white cardboard. A portion of the upper half 1 of the housing 3 adjacent to the lamp 6 is formed as two inclined surfaces 1a and 1b having different inclination angles, and one mirror reflector 10a located around the lamp is provided with the inclined surfaces 1a and 1b. It is continuously attached to The specular reflector portion located on the inclined surface 1a is at an angle such that the light coming from the lamp is directed to the diffuse reflector, while the specular reflector portion located on the inclined surface 1b is used to transfer the light from the lamp to the lamp. The angle is such that it points toward the diffuse reflector at a point far from the camera.

In use, when the lamp 6 is turned on, the light from the lamp 6 directly impinges on the diffuse reflector 11 and is diffused and reflected, and the mirror reflector 9 on the diffuse reflector 11 and around the lamp to the housing. The light is reflected by the provided specular reflector. The light reflected on the specular reflector portion located on the inclined surface 1a impinges on the specular reflector plate 9 on the diffuse reflector 11, is reflected toward the acrylic plate 5, and is reflected on the inclined surface 1b. Light reflected by the plate portion strikes the diffuse reflection plate 11 and reflects toward the acrylic plate 5. As a result, the brightness in the acrylic plate region far from the lamp can be relatively increased, and the brightness near the lamp can be relatively reduced. Therefore, by improving the uneven brightness over the acrylic plate, it is possible to accurately check the negative film and the positive film that are placed on the acrylic plate and illuminated from below.

[Brief description of the drawings]

FIG. 1 is a perspective view of a photographic lighting device according to the present invention.

FIG. 2 is a sectional view of the photographic lighting device according to the present invention.

FIG. 3 is a cross-sectional view of a conventional photographic lighting device.

FIG. 4 is a cross-sectional view of another conventional photographic lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper half part of housing 2 Lower half part of housing 3 Plastic housing 4 Window 5 Translucent acrylic plate 6 Lamp 7 Supporting rib 8 Curved surface 9 Mirror reflector 10a Mirror reflector 10b Mirror reflector 11 Diffuse reflector

Claims (1)

[Utility model registration claims] 1. A plastic housing formed by screwing an upper half portion and a lower half portion, a milky white translucent acrylic plate attached to a window at the top of the upper half portion, and one of them in the housing. A lamp attached to the end of the
A diffuse reflector supported under the acrylic plate and supported by a curved surface of a support rib formed integrally with the lower half of the housing, and a specular reflector mounted on the inner surface of the housing around the lamp. In the photographic lighting device, a specular reflector bonded to the diffuser reflector on the lamp side half except for a portion adjacent to the lamp is provided, and a portion of the upper half of the housing adjacent to the lamp is inclined. With two inclined surfaces having different angles, a part of the specular reflector located around the lamp is positioned on the inclined surface so that light from the lamp is directed to the diffuse reflector and the specular reflector thereon. A lighting device for photographs, which reflects light.