JPH0529066U - Light indicator - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to change the beam pattern of a light beam emitted from an optical pointing device and to identify a plurality of optical pointing devices. [Structure] A cap 9 is detachably attached to the tip of a light indicating device body 12 that emits visible light. The caps 9 are replaceable, and each cap 9 has an opening 8 for shaping the beam pattern of the light beam α into a circular shape, a triangular shape, a quadrangular shape, an arrow shape, or the like. Therefore, the beam pattern can be changed by replacing the cap 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light indicating device. More specifically, the present invention is used, for example, at a meeting or a lecture to use visible light to indicate an explanation location or a relevant area, or to indicate an object at a distant location by visible light. The present invention relates to an optical pointing device used for.

[0002]

[Prior Art]

 In recent years, slides, OHPs (overhead projectors) and the like are often used as auxiliary devices at lectures, briefing sessions, conferences and the like. When explaining figures and tables using these auxiliary devices, a pointing rod or an optical pointing device is used to point to the point of explanation.

FIG. 5 shows a conventional optical pointing device (pointer) 51. When the switch 52 is operated to turn it on, the light pointing device 51 emits a light beam 54 in a circular pattern from the light projecting window 53. By projecting the light beam 54 at a designated position. It is possible to indicate the point of indication from a distant position.

[0004]

[Problems to be solved by the device]

 At conferences and presentations, each person may have an optical pointing device, and use a light beam to indicate the point of reference such as a diagram projected on the screen for discussion and consideration.

However, when a plurality of people hold the light indicating device 51 as described above and project the light beams at the same time toward a diagram or the like on the screen, the beam patterns of the light beams are the same in all cases. However, there was a problem that it was confusing because it was not possible to determine which beam pattern was used by whom.

The present invention has been made in view of the drawbacks of the above-mentioned conventional examples, and an object thereof is to make it possible to change the beam pattern for each optical pointing device and to provide two or more optical pointing devices. The beam patterns can be discriminated by using simultaneously.

[0007]

[Means for Solving the Problems]

 The light indicating device of the present invention is a light indicating device for indicating a pointing object or a pointing portion by emitting visible light in a pointing direction, and is attachable / detachable to / from the visible light emitting window portion of the light indicating device body. It is characterized in that the beam pattern is changed by attaching a cap to the cap, providing an opening for converting the beam pattern of visible light in the cap, and exchanging with a cap having a different opening pattern.

[0008]

[Action]

 In the present invention, since the beam pattern of the light beam emitted from the light indicating device main body can be changed by replacing the cap, when two or more light indicating devices are used simultaneously, The beam pattern of the pointing device can be different. As a result, it is possible to discriminate the optical pointing device being used and hence the user by the difference in the shape of the beam pattern.

[0009]

【Example】

 FIG. 1 is a sectional view of a light indicating device 31 according to an embodiment of the present invention. The light indicating device 31 is composed of a light indicating device main body 12 and a plurality of caps 9. The light indicating device main body 12 includes a light emitting element 1 such as a semiconductor laser element or a light emitting diode that emits visible light, a lens 2 that transmits a light beam (visible light) α emitted from the light emitting element 1, a dry cell, or the like. The battery 3 for driving, the driving circuit 4 for driving the light emitting element 1, and the contact 5 for turning on / off the power of the driving circuit 4 are housed in the case 6, and the switch for opening and closing the contact 5 7 is provided on the surface of the case 6, and the front end surface of the case 6 facing the lens 2 is entirely opened. The cap 9 is detachably fitted to a small diameter portion 13 provided on the outer periphery of the tip portion of the light indicating device body 12.

The lens 2 is for collimating, converging or slightly diffusing the diffused light of the light emitting element 1. In addition to a refraction lens such as a spherical lens or an aspherical lens, a Fresnel lens or the like. It may be a diffractive lens or a combination lens. Further, the outside of the lens 2 can be closed with a glass plate or a transparent plastic plate for lens protection.

When the rear part of the case of the light indicating device 31 is grasped with the hand and the switch 7 is pressed, the contact point 5 is closed and the drive circuit 4 is turned on, the light emitting element 1 is driven and the light beam α is emitted. .. Therefore, by irradiating the pointing portion or the pointing object with this light beam α, the pointing portion or the like can be indicated.

FIG. 2A is a sectional view of the cap 9. The cap 9 is a flat plate provided with a cylindrical portion 10 for fitting into the small diameter portion 13 of the light directing main body 12 and a beam pattern shaping opening 8 for emitting the light beam α as a predetermined beam pattern. It consists of part 11 and. The cap 9 can also be screwed on the optical indicator device body 12 by screwing a screw provided on the inner peripheral surface of the cylindrical portion 10 with a screw provided on the small diameter portion 13. .. The cap 9 may be made by injection molding of resin or may be made by sheet metal working.

Caps 9 having openings 8 of various shapes are prepared. For example, FIG. 2 (b) is a cap having a circular opening 8a, FIG. 2 (c) is a cap having a square opening 8b, FIG. 2 (d) is a cap having a triangular opening 8c, and FIG. The cap 9 has an arrow-shaped opening 8d. The shape of the aperture 8 may be other than the pattern shown here, as long as the beam patterns can be distinguished from each other. When these caps 9 are attached to the light indicating device main body 12, a part of the light beam α emitted from the light indicating device main body 12 is blocked by the flat plate portion 11 of the cap 9, and the beam pattern having the same shape as the opening 8 is formed. The beam shape is shaped so that

FIG. 3 shows a situation in which a conference is held using the three optical pointing devices 31. A cap 9 having a circular opening 8a is attached to one of the three light indicating devices 31, and a cap 9 having a square opening 8b is attached to another one, and further A cap 9 having a triangular opening 8c is attached to one of them. Each person on the table 14 has three light pointing devices 31 one by one, and emits the light beam α toward the screen 15. The beam pattern reflected on the screen 15 is as shown in FIG. Since it is a circular beam, a triangular beam, or a square beam, the light beam α operated by each person can be distinguished, and the conference can proceed smoothly.

4A and 4B, detailed beam patterns 16 and 17 of the light beam α passing through the cap 9 having the circular opening 8a and the cap 9 having the rectangular opening 8b and the intensity distribution thereof. (Strength profile) is shown. When the light beam α passes through the openings 8a and 8b, vignetting occurs at the edges of the openings 8a and 8b of the cap 9, so that diffraction patterns are generated in the beam patterns 16 and 17. For this reason, although the beam patterns 16 and 17 are slightly blurred at the outer peripheral portion, there is no problem in distinguishing the beam patterns 16 and 17, and the beam patterns 16 and 17 can be sufficiently distinguished.

[0016]

[Effect of the device]

 Since the light indicating device of the present invention can change the beam pattern of the emitted light beam, if two or more light indicating devices are used at the same time, the beam pattern of each light indicating device can be made different. It is possible to distinguish the optical pointing device in use and the user from each other by the difference in the shape of the beam pattern. Therefore, even if a plurality of optical pointing devices are used in a meeting or a presentation, the meeting or the like can proceed smoothly without confusion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an optical pointing device according to an embodiment of the present invention.

FIG. 2 (a) is a cross-sectional view showing the cap of the same, (b).
(E) is a front view of the cap which has the opening for beam pattern shaping of various patterns.

FIG. 3 is a diagram illustrating a usage situation of the light indicating device.

4A and 4B are diagrams showing a detailed beam pattern and its intensity distribution of a light beam emitted from a light indicating device having a circular opening and a square opening, respectively.

FIG. 5 is a perspective view showing an optical pointing device according to a conventional example.

[Explanation of symbols]

 8 Opening 9 Cap 12 Light indicator main unit

Claims (1)

[Scope of utility model registration request] 1. A light indicating device for indicating a pointing object or a pointing place by emitting visible light in a pointing direction, wherein a cap is detachably attached to an end portion of the body of the light indicating device on the visible light emitting side. An optical pointing device in which an opening for attaching and converting a beam pattern of visible light is provided in the cap, and the beam pattern can be changed by exchanging with a cap having a different opening pattern.