JPH0542401Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a light guide, and more particularly to a light guide using an optical fiber and used for illuminating a camera of an image processing device.

[Conventional technology]

Conventionally, this type of light guide, as shown in FIG.
A light receiving section 1a has one end surface exposed to form a light receiving surface 11a, and a metal case 12a for coupling is inserted into the light receiving section 1a, and a metal ring case 32b provided at the other end of the optical fiber bundle 2a. A light projecting section 3b includes an optical fiber opening 31d in which each optical fiber of the optical fiber bundle 2a is arranged and fixed on a predetermined surface of the metal ring case 32b on the circumference so that the opening surfaces are substantially on the same plane. has a light receiving section 1
The structure was such that the light incident from the light receiving surface 11a of a is transmitted through the optical fiber bundle 2a, and the transmitted light is emitted from the optical fiber opening 31d and projected onto a predetermined object.

[Problem that the invention attempts to solve]

The conventional light guide described above has a light receiving section 1a1.
On the other hand, the optical fiber opening 31d of the light projecting section 3b
Since the configuration has one light guide, when projecting light from multiple light sources onto the subject, such as lighting for a camera in an image processing device, the same number of light guides as the light sources are required. The disadvantage is that it is difficult to project light from multiple light sources when the space is small or when the surrounding space is narrow.

An object of the present invention is to provide a light guide that can easily project light from a plurality of light sources even if the subject is small or the surrounding area is narrow.

[Means for solving problems]

The light guide of the present invention consists of a plurality of optical fiber bundles each having a light-receiving surface provided at one end by bundling together a large number of optical fibers each having a fine diameter. The optical fibers of each optical fiber bundle are arranged and fixed on concentric circles so that the aperture surfaces of the optical fibers are approximately on the same plane, and a plurality of optical fiber openings emit the transmitted light. It has a light projecting section with a section.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1a to 1c are a plan view, a side view, and a partial side view, respectively, showing a first embodiment of the present invention.

The optical fiber bundles 2a and 2b are each bundled and coated with a large number of optical fibers with a fine diameter, and have light receiving surfaces 11a and 11b at one end and metal cases 12a and 12b.
Light receiving sections 1a and 1b are provided, and light receiving surfaces 11 and 1b are provided.
transmits the light incident from a and 11b.

The light projecting unit 3 includes a metal ring case 32 and a predetermined surface of the metal ring case 32, in which each of the optical fibers on the other end side of the optical fiber bundles 2a and 2b is arranged on a concentric circumference so that the opening surfaces of these optical fibers are arranged concentrically. Optical fiber openings 31a and 31b are arranged and fixed on the same plane, and the light transmitted through the optical fiber bundles 2a and 2b is radiated from the optical fiber openings 31a and 31b to the target object. to project light.

Therefore, in cases where light from two light sources, a strobe light source and a halogen lamp light source, are projected onto a subject at the same time using lighting for a camera of an image processing device, conventionally two light guides were required, but with this invention, two light guides are required. According to , only one light guide is required, making it easy to project light even if the subject is small or the surrounding space is narrow.

FIG. 2 is a plan view of main parts showing a second embodiment of the present invention.

In this embodiment, two optical fiber openings connected to the optical fiber bundles 2a and 2b have the same diameter and are combined into an optical fiber opening 31c on one circumference.

[Effect of idea]

As explained above, the present invention arranges the optical fibers at the other end of a bundle of multiple optical fibers each having a light-receiving surface at one end on a concentric circle, emits the transmitted light, and projects the light onto an object. By having a configuration that
One light guide can simultaneously project light from multiple light sources onto an object, so it is possible to project light from multiple light sources at the same time, such as a strobe light source and a halogen lamp light source, such as lighting for a camera in an image processing device. When projecting light onto a subject, there is an effect that the light can be easily projected even if the subject is small or the surroundings are narrow.

[Brief explanation of the drawing]

1A to 1C are a plan view, a side view, and a partial side view showing a first embodiment of the present invention, respectively; FIG. 2 is a plan view of essential parts of a second embodiment of the present invention; FIG. 3 A to C are a plan view, a side view, and a partial side view showing an example of a conventional light guide. 1a, 1b... Light receiving section, 2a, 2b... Optical fiber bundle, 3, 3a, 3b... Light projecting section, 11a,
11b... Light receiving surface, 12a, 12b... Metal case, 31a to 31d... Optical fiber opening, 3
2, 32a, 32b...Metal ring case.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of optical fiber bundles each having a light-receiving surface provided at one end by bundling a large number of optical fibers each having a fine diameter, and transmitting light from the light-receiving surface, and a bundle of these optical fibers. A plurality of optical fibers provided on the other end side are arranged and fixed on concentric circles so that the aperture surfaces of the optical fibers are approximately on the same plane, and emit the transmitted light. 1. A light guide comprising: a light projection section having an optical fiber opening; (2) A light according to claim (1) of the utility model registration, in which at least two of the plurality of optical fiber openings have equal diameters and the at least two optical fiber openings are arranged on one circumference. guide.