JPH025018A - Laser pointer - Google Patents

Abstract

PURPOSE:To clearly display an irradiating point and to hide the hand movement of an explaining person in a line direction by widening a laser beam projected from a laser tube in a line by means of a cylindrical lens and using the laser beam as a line pointer. CONSTITUTION:The laser tube 1 is supported and fixed in a cylinder case 2 by an O ring 3, and a laser power source 6 which operates the laser tube 1 is installed at the rear of the case on a rear plate 7. The laser power source 6 and the laser tube 1 are connected by an anode lead 4 and a cathode lead 5, and the laser tube 1 discharges by activating the laser power source 6 and laser beam 8 is oscillated. The cylindrical lens 10 which widens the laser beam 8 in line form is installed on a front plate 9, and the orbicular laser beam 8 projected from the laser tube 1 is widened by the cylindrical lens 10 and is projected in line. The laser beam projected in line form is allowed to irradiate on a display material and an OHP and is used as a laser line pointer. Thus, the irradiating point is clearly indicated.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a laser pointer.

[Conventional technology]

Conventional laser pointers consist of a laser tube and a laser power source, and when the laser tube is operated with a laser power source, the laser light obtained is directly irradiated onto a display object or an OHP projection object, and is used as an auxiliary device for presentations, etc. ing.

[Problem to be solved by the invention]

The conventional laser pointer mentioned above uses the circular (beam cross-sectional shape) laser beam emitted from the laser tube as the irradiation object, so the beam diameter at the irradiation point is small and difficult to see, and it also feels difficult to hold in the hand. When using the system, the disadvantage is that the irradiation position changes frequently and is difficult to see because the hand movements of the presenter are directly transmitted.

The present invention aims to solve the above-mentioned problems by converting the beam cross-sectional shape of laser light from circular to linear.

[Means to solve the problem]

The laser pointer of the present invention includes a laser tube for oscillating laser light, a laser power source for operating the laser tube, and a cylindrical lens for converting the laser beam emitted from the laser tube into a line shape. The structure is as follows.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention. Laser tube 1
is held and fixed to the cylindrical case 2 by an O-ring 3. Behind it, a laser power source 6 for operating the laser tube 1 is attached to a rear plate 7. The laser power source 6 and the laser tube 1 are connected by the annometry F4 and the cathode lead 5, and when the laser power source 6 is activated, the laser tube 1 is discharged and the laser beam 8 is oscillated. In addition,
Generally, the laser power source 6 is constructed to operate by applying power to a switch of a dry battery built in the laser power source 6, but the dry battery and switch are omitted in this figure.

A laser and a cylindrical lens 0 for spreading the light 8 in a line are installed on the front plate 9, and the laser tube 8 having a circular shape (the cross-sectional shape of the beam) emitted from the laser tube 1 is reflected by the cylindrical lens 10. It spreads out and radiates in a line. This line-shaped laser beam is irradiated onto a display object or OHP,
Can be used as a racer line pointer.

In this embodiment, an adjustment part 11 for adjusting the width of the laser beam is attached to the outer periphery of the output end of the cylindrical case 2.
By not moving the adjusting part 11 in the axial direction of the cylindrical case 2, the width of the laser beam at the irradiation point can be freely adjusted.

FIG. 2 is a longitudinal sectional view of Example 2 of the present invention.

] is a laser tube, 2 is a cylindrical case, 3 is an O-ring, 4 is an anno-1 lead, 5 is a can-1 lead, 6 is a laser power source, 7 is a rear plate, 8 is a laser beam, and in this example, After changing the thickness of the laser beam 8 using the concave lens 12 attached to the front plate 9, take it to the adjusting part]1 (-t 89 cylindrical lens)0 and spread it out in a line shape, as shown in Figure 1. Similarly, it is possible to adjust the width of the line of the irradiation point.In this embodiment, by appropriately selecting the focal length of the concave lens 2, the amount of movement of the adjustment part 11 is smaller than in FIG. It also has the advantage of being able to adjust the line width to the same extent.

〔Effect of the invention〕

As explained above, the present invention uses a cylindrical lens to spread the laser light emitted from the laser tube in a line shape and use it as a line pointer to clearly indicate the irradiation point. Movement in the line direction has the effect of making it very inconspicuous.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of one embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Laser tube, 2... Cylindrical case, 3... O-ring, 4... Anode lead, 5... Cathode lead, 6... Laser power supply, 7... Rear plate, 8 ...Laser light, 9...Front plate,]0...Cylindrical lens, 11
...adjustment parts, 12...concave lens.

Claims (1)

[Claims] A laser pointer comprising a laser tube, a power source for operating the laser tube, and a cylindrical lens installed on the front optical path of the laser tube to convert the cross-sectional shape of the laser beam into a straight line. .