JPS62238089A - Device for adjusting optical axis of beam - Google Patents

Abstract

PURPOSE:To smoothly adjust an optical axis with a lightweight and simple device and with high accuracy by constituting a titled device in such a manner that a support is rotated around supporting pins and supporting shaft by rotating screws of a support pressing mechanism. CONSTITUTION:A pair of the supporting pins 32 fixed to the outside surface of the support 31 around the central axis of the support are held in the central position on the diametrically opposed sides of a supporting frame 33 and the support 31 is rotated around the axes of the supporting pins 32. A pair of the supporting shafts 34 fixed to the centers on the two sides orthogonal with the sides pivotally fitting the supporting pins 32 of the supporting frame 33 permit rotation of the supporting frame 33 around the shafts 34 at the outside frame 35. The support 31 permits rotation in the orthogonal direction around he pins 32 and shafts 34. Two pairs of the pressing mechanisms consisting of screws 36 and screws 37 with springs with the support 31 in-between are disposed to intersect orthogonally on the same plane in the lower part of the wall surface of the outside frame 35 to constitute the mechanism for adjusting the optical axis. The screws 36 are thus rotated to press the outside surface of the support 31 so that the support 31 adjusts the inclined optical axis.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of an optical axis adjustment device for a device that projects light such as an LED or a laser beam.

(Prior art) Figure 2 is a block diagram showing the principle of displacement measurement using a displacement meter that uses light.
) onto the object to be measured (3). A part of the reflected and scattered light is then projected onto a position sensor (5) through an imaging lens (4) to create an image (6) of the reflection point.

When the object to be measured (3) moves to (3a), the image (6) of the reflection point also moves to (6a) accordingly. The position sensor (5) is a photodiode in which a uniform resistance layer is formed on the surface of a silicon substrate, and a pair of electrodes A and B for signal extraction are provided on the surface of the resistance layer. When the light is incident, a current proportional to the energy of the incident light is divided into currents it and i2 and output from the electrodes A and B depending on the position of the point of incidence.

Therefore, ll+12, which changes according to the 8th wave of the reflection point, is converted into voltages Vl and v2 by the current-voltage converter (7), and these are input to the calculators (8), (9), and Oo for calculation. Then, the displacement (11) of the object to be measured (3) is obtained.

FIG. 3 is a perspective view of a light emitting and light receiving section of a displacement meter that uses a laser beam. In the figure, (3) is the object to be measured, the handle is the light emitting block, Qυ is the laser beam, the company is the light receiving lens, (
C) is a reflecting mirror, and Qψ is an optical position detector. In the figure, the object to be measured (
The laser beam Q1) projected onto the object to be measured (3)
A part of the reflected beam passes through the light receiving lens (c), is reflected by the reflecting mirror, and enters the optical position detector (to).

[Problems to be solved by the invention] By the way, in the displacement meter using the above laser beam,
Those with a measured displacement of about 50 mm usually do not have a mechanism for adjusting the optical axis of the light projection block. Therefore, the optical axis of the projected beam often deviates from the desired spot, which adversely affects measurement accuracy.

The present invention was made in order to solve the above-mentioned problems of the conventional device, and aims to provide a lightweight, simple, and easily adjustable optical axis adjustment mounting.

(Means for solving problems) A light emitting block for a displacement meter that uses light.

a light source support that houses a light source and a light projection lens therein;

A support frame that rotatably holds the support body around the support pin through a single support pin fixed to the outer surface of the support body so that its central axis passes through the center of the light projecting lens.

an outer frame that rotatably holds the support frame around the support shafts via a pair of support shafts fixed to the outer surface of the support frame so as to be perpendicular to the support pins on the same plane;

Two pairs of support pressing mechanisms, each consisting of a pair of screws and a spring-loaded screw, which penetrate the wall surface of the outer frame and are arranged symmetrically with the support in between, are arranged orthogonally on the same plane. and an adjustment mechanism.

It was made up of more.

(Function) Since the light projection block is configured as described above, the beam can be adjusted by rotating the screw of the adjustment mechanism to press the support and rotating the support around the support pin or shaft. The optical axis can be adjusted.

(Potential Example of the Invention) FIG. 1 is a perspective view of an optical axis adjustment device showing an embodiment of the present invention, in which (the edge is a light projection block, (3N) is a light source support, (2
) is the support pin, (to) is the support frame, (to) is the support shaft, □□
□ is the outer frame, (A) is the screw, (Haku is the spring-loaded screw.

As shown in the figure, the light projection block (a) consists of a support body 01 containing a light source and a light projection lens (none of which are shown).
), a support frame (2), and an outer frame (vessel).

A pair of support pins (
The shu is held at the center position of the opposing sides of a square support frame (4), and is configured so that the support (3υ) can rotate around the axis of the support pin (2). A pair of support shafts (341 are fixed to the center of two sides perpendicular to the side on which the support pin (5) is attached) of the outer frame (34 is glazed) As a result, the support body 0υ can rotate in the right angle direction about the support pin (32) and the support shaft (2).

Next, two pairs of pressing mechanisms consisting of a decoy and a spring-loaded mechanism are placed perpendicularly on the same plane, symmetrical to the center of the support with the outer frame (3!9 below the wall surface, support 01) in between. The optical axis adjustment mechanism is configured by configuring the optical axis adjustment mechanism. Spring attachment (5) has a built-in coil screw in addition to the screw, so it moves forward and backward as it rotates, and also receives pressure and acts as a spring force.

Since the optical axis adjustment device according to the present invention is configured as described above, by rotating the bend (2) and pressing the outer surface of the support body 3B, the support body (31) can be tilted to adjust the optical axis. It is possible. By appropriately adjusting the pitch of the screw and the spring force of the spring-loaded screw, the optical axis can be finely adjusted.

In the above embodiment, the support frame (to) and the outer frame (■ are square, but they may be cylindrical.Also, the above embodiment is an example in which the light emitting block of a displacement meter using light is used, but the It can be used not only for meters but also for a wide range of equipment that emits beams.

[Effects of the Invention] The present invention provides an optical axis adjustment device for a light projecting device such as an LED or a laser beam, which comprises: a light source support that includes a light source and a light projecting lens; a support frame that holds the light source support with support pins; It consists of an outer frame that holds the support frame with a support shaft, and an adjustment mechanism consisting of two pairs of screws and spring-loaded screws attached to the wall of the outer frame, so it has the following excellent effects. It was carp.

(1) Optical axis adjustment can be performed smoothly and with high precision.

(2) The optical axis adjustment device can be manufactured compactly and easily.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an optical axis adjustment device showing an embodiment of the present invention, FIG. 2 is an explanatory view showing the principle of a displacement meter, and FIG. 3 is a perspective view of the displacement meter. In the figure (3III is the light projection block, (31) is the light source support, (32 is the support pin, () is the support frame, (3→ is the support shaft, (@ is the outer frame, ((G) is the screw, (The first one is a spring-loaded screw. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A light source support body having a light source and a light projection lens therein; and a light source support body having a central axis passing through the center of the light projection lens on the outer surface of the support body with the light projection lens in between. a support frame to which a pair of support pins are fixed and which rotatably holds the support body around the support pins via the pair of support pins; A pair of support shafts are fixed on a plane orthogonally to the support pins, and a support frame is rotatably held around the support shafts via the pair of support shafts; an adjustment mechanism in which two pairs of support pressing mechanisms, each consisting of a screw and a spring-loaded screw, which penetrate a wall surface and are arranged symmetrically with the support in between, are arranged orthogonally on the same plane; The present invention is characterized in that the optical axis of the beam of the projection lens can be adjusted by rotating the screw of the support pressing mechanism to rotate the support around the support pin and the support shaft. Beam optical axis adjustment device.