JPH0647807U - Laser light checker - Google Patents

Abstract

(57) [Summary] [Purpose] To make it easy to check the laser beam and to perform tasks such as adjustment of laser light application equipment. [Structure] A housing 12 is provided with a phototransistor 14 that is sensitive to laser light, and a laser light confirmation lamp 18 that is turned on based on a signal emitted when the laser light hits the housing. Then, the presence and position of the laser light is confirmed based on the lighting of the laser light confirmation lamp 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a laser light checker.

[0002]

[Problems to be solved by conventional techniques and devices]

 2. Description of the Related Art Conventionally, various devices and devices using laser light, such as displacement measuring devices and length measuring devices that measure displacement and length using laser light, have been used in a wide range of fields. By the way, the laser light generally used in commercially available displacement measuring instruments and length measuring instruments is invisible light having a wavelength of about 780 nm and cannot be directly confirmed with the eyes. In addition, even if the laser light is visible light, it is prohibited to directly see it for safety reasons.

Moreover, the luminous flux (laser beam) of the laser light is thin and has a small cross-sectional area. Therefore, for example, in the displacement measuring instrument, the optical axis is aligned when the laser light is applied to the object and the reflected light is returned to the measuring instrument. In the past, adjustment work such as this had to be performed relying on intuition, and this work had been extremely difficult.

[0004]

[Means for Solving the Problems]

 The laser light confirming device of the present invention has been devised to solve such a problem, and its gist is to provide a housing and a light sensitive to the laser light arranged in the window of the housing. It is to have a detection element and a display means such as an indicator lamp which is provided in the housing and operates based on laser light irradiation to the light detection element.

[0005]

[Action and effect of the device]

 The laser light checker of the present invention is provided with a window portion for detecting laser light in the housing, a light detecting element is arranged therein, and a display means such as an indicator lamp is provided. When this detector is extended to the part to be positioned and the photodetection element is positioned at the corresponding part, when the laser beam is present there, the photodetection element responds and the display means displays it.

With this, it is possible to confirm the presence or absence of the laser beam and the position thereof. Therefore, if the laser beam confirmation device of the present invention is used, a laser beam-based displacement measuring device, length measuring device, or other laser beam application device It will be easy to perform optical axis alignment and adjustment work.

[0007]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a laser beam checker, which has a rectangular box-shaped housing 12. In this example, the housing 12 has a width W of 68 mm, a depth D of 45 mm, and a height H of 110 mm in the figure.

A window is provided in the housing 12, and a phototransistor 14 as a laser light detecting element is provided therein. Further, the housing 12 is provided with a power switch 16, a laser light confirmation lamp (indicator lamp) 18, a power lamp 20, and an operation section 22 for sensitivity adjustment. A battery 24 and a circuit board 26 are housed inside the housing 12.

FIG. 2 shows an electric circuit configuration of the present apparatus. In the figure, 28, 30, and 32 are resistors (32 is a variable resistor), and 34 is a comparator including an operational amplifier. The inverting input terminal of the comparator 34 receives the laser light detection signal voltage from the phototransistor 14, and the non-inverting input terminal receives the reference voltage set by the resistors 28 and 32. ing. Further, a confirmation lamp 18 composed of a light emitting diode is connected to the output terminal side. The operation unit 22 for adjusting the sensitivity adjusts the resistance value of the variable resistor 32.

In the device 10 of this example, when the power switch 16 is pressed, the power supply lamp 20 is turned on, indicating that the laser light is ready for checking. When the entire device 10 is moved in this state and the phototransistor 14 reaches the laser beam irradiation position, the phototransistor 14 is turned on and the voltage value input to the inverting input terminal of the comparator 34 is non-inverting input. The voltage becomes higher than the reference voltage value input to the terminal, and a negative voltage is output to the output terminal, which turns on the confirmation lamp 18 composed of a light emitting diode, indicating that the laser beam has been detected.

Therefore, it can be clearly confirmed that the laser light is present at the position where it hits the phototransistor 14, and based on this, the optical axis alignment work of the laser light and other adjustment work can be easily performed.

The laser light confirming device 10 of this example is compact as described above, is easy to carry, and has the advantage that the presence or absence or position of the laser light can be easily confirmed at any site. .

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention can be configured in a form in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the invention. .

[Brief description of drawings]

FIG. 1 is an external view of a laser light confirmation device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a circuit configuration in the same laser beam confirming device.

[Explanation of symbols]

 10 Laser Light Confirmation Device 12 Housing 14 Light Detection Element 18 Confirmation Light (Indicator Light)

Claims (1)

[Scope of utility model registration request] 1. A housing, a photodetection element which is disposed in a window portion of the housing and is sensitive to laser light, and a display which is provided in the housing and operates based on laser light irradiation to the photodetection element. A laser light confirmation device comprising a display means such as a lamp.