JP2844782B2 - Laser pointer with pulse drive function - Google Patents

Description

The present invention relates to a laser pointer, and more particularly to a laser pointer using a small laser such as a semiconductor.

[Summary of the Invention]

The present invention provides a laser pointer having a pulse driving function, comprising a switching means for switching between continuous light emission and blink light emission in a blink range identifiable to the naked eye, and / or switching between two or more different kinds of blink light emission. Even when a laser pointer is used, it is possible to identify each laser pointer and to diversify functions.

[Conventional technology] In recent years, OHP (overhead
When a lecturer or a third party designates a character or a figure on an image projected by a projector, a blackboard, or the like, a laser pointer using a laser beam capable of obtaining a bright and clear minute spot is used.

This laser pointer is configured by emitting a relatively small output laser beam using a small laser emitting section, for example, a semiconductor laser diode, for the light emitting section, and storing the laser beam in a small portable penlight type package. Is done.

However, the conventional laser pointer is CW (Contin
continuous wave), that is, laser emission by continuous light was used, and only the function of continuous lighting was used.For example, when pointing to a specific character or figure by emphasizing it, the laser pointer itself was swung and the laser light spot was changed. There is a drawback that it is difficult to focus the observer's attention because it can only be moved and displayed. In addition, when an instruction is given by a plurality of persons using a laser pointer, there is a problem that it is difficult to identify each instructor, and confusion is caused.

[Problems to be solved by the invention]

The present invention is a laser pointer, for example, even when using a plurality of laser pointers by a plurality of people,
Each laser pointer can be identified, and functions are diversified.

[Means for solving the problem]

The present invention, as shown in FIG.
Switching means (5) and (6) for switching between continuous light emission and blinking light emission in a blinking range identifiable to the naked eye, and / or switching between two or more different kinds of blinking light emission in a laser pointer (10) having a pulse driving function. Is provided.

(Operation)

The laser pointer according to the present invention has a pulse driving function and can emit not only CW continuous light but also pulse light with different blinking light, that is, with different frequency or (and) pulse width. Therefore, even when using a plurality of laser pointers, the emission of each laser pointer, continuous emission or blinking emission that can be identified with the naked eye,
Alternatively, since it is possible to adopt a blinking mode with different frequencies or / and pulse widths, when a plurality of users use the laser pointer, it becomes possible to identify the individual laser pointer.

When a specific character or figure is to be emphasized and instructed, the frequency or (and) the pulse width of the laser pointer used as the continuous light is switched within a range that can be recognized and identified by the naked eye, so that the pulse can be changed. It can be turned on, and can be multifunctional.

〔Example〕

An example of a laser pointer having a pulse driving function according to the present invention will be further described with reference to FIG.

In FIG. 1, (1) is, for example, a semiconductor integrated circuit IC configured to include a drive circuit for a laser light emitting section (3) of a laser pointer (10), for example, a pulse generation circuit and the like.
(2) shows the power supply unit. (5) and (6) are IC
(1) Frequency switching means (5) and pulse width switching means (6) for performing frequency switching and pulse width switching of a pulse generating circuit, for example, respectively.

(4) is a laser light detection circuit (4) having a light receiving element for detecting the laser light L from the laser light emitting section (3), for example, a photodiode or the like. For example, the pulse light emitting circuit of 1) is controlled to detect and control the driving at the frequency and pulse width set by the frequency switching means (5) and the pulse width switching means (6).

In this way, the laser light emitting section (3) is controlled with continuous light emission or a predetermined frequency and pulse width, and the laser light emitting section (3) can output pulse laser light Lout having a required frequency and pulse width. it can.

An example of a specific structure of such a laser pointer will be described with reference to a side view of FIG.

(11) is a so-called penlight type cylindrical package made of, for example, Al and made of a shape that is easy to grasp, and has a power supply unit (2) such as a dry battery and an IC (1) (not shown) inside the package. In addition, a laser module (13) including a laser diode, a photodiode, and a lens system such as a collimator lens is accommodated, and has a window (14) at the tip thereof.
Is derived.

In addition, package (11), laser module (1
A hole (12) serving as a ventilation hole, for example, in which a plurality of slits are formed, is provided at a position opposed to each other with the laser light emitting unit (3) interposed therebetween in (3).

(15) denotes a power switch, and (25) and (26) denote a frequency switching knob and a pulse width switching knob for performing a frequency and pulse width switching operation.

In this configuration, when the switch (15) is turned on,
The IC (1) is driven by the power supply unit (2), and the laser beam Lout is beamed through the window (14) with the frequency and pulse width set by the frequency switching unit (5) and the pulse width switching unit (6). Light can be emitted in the shape of an arrow, and irradiation can be directed to a target position.

In this case, when the hole (12) is provided in the package (11), a temperature rise due to heat generation of the laser module (13) can be suppressed by an air cooling action. Although this hole (12) is formed in a slit shape in FIG. 2, any other structure such as a net-like structure having a good ventilation and an opening for preventing dust from entering may be used.

〔The invention's effect〕

The laser pointer according to the present invention has a pulse driving function and can emit not only CW light but also pulse light with different blinking light emission, that is, with different frequency or (and) pulse width. For this reason, even when a plurality of laser pointers are used, the frequency and pulse width of each laser pointer are switched to provide continuous light emission or blinking light emission that can be identified by the naked eye, or blinking with a different frequency or pulse width. Therefore, when a plurality of users use the laser pointer, it is possible to identify each laser pointer.

When a specific character or figure is to be emphasized and instructed, the frequency or (and) the pulse width of the laser pointer used as the continuous light is switched within a range that can be recognized and identified by the naked eye, so that the pulse can be changed. It can be turned on, and can be multifunctional.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a pulse driving unit of a laser pointer, and FIG. 2 is a side view of the laser pointer. (10) is a laser pointer, (1) is an IC, (2) is a power supply unit, (3) is a laser light emitting unit, (4) is a laser light detection circuit, (5) is frequency switching means, and (6) is a pulse. Width switching means, (11) package, (12) hole, (13) laser module, (14) window, (15) switch,
(25) is a frequency switching knob, (26) is a pulse width switching knob, and L and Lout are laser beams.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-91679 (JP, A) JP-A-2-235013 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G09B 19/00 G02B 27/20

Claims (2)

(57) [Claims] 1. A laser pointer having a pulse driving function comprising a pulse generating circuit, comprising: switching between continuous light emission and blinking light emission within a range recognizable by the naked eye;
And a switching means for switching at least one of two or more different types of blinking light emission, and a laser light detection circuit, wherein the pulse generation circuit is controlled by the detection output of the laser light detection circuit, and the switching is performed. A laser pointer characterized in that it is driven at a setting by means. 2. A laser pointer having a pulse driving function provided with a pulse generating circuit, wherein a continuous light emission and a blink light emission are switched within a range recognizable by the naked eye in a package of the laser pointer, and two or more kinds of different light emission are provided. A laser pointer, wherein switching means for switching at least one of blinking light emission is accommodated, and a hole is formed in the package.