JPH0743687Y2 - Dual emission type laser optical axis adjusting device - Google Patents

Description

[Detailed Description of the Invention] [Purpose] Industrial field of application: This invention relates to a dual emission type laser optical axis adjusting device used for a vertical device or the like.

Conventional technology ……………… Installation of large machine tools and industrial machines
Positioning for assembly adjustment, positioning survey for various works,
In particular, in the case of a dual emission laser used for surveying by a vertical instrument that aligns the surveying instrument according to the ground mark at a high place, both laser optical axes emitted on both sides of the laser tube are I have to do it. This is because surveying using a dual emission laser whose optical axes do not match cannot maintain high accuracy, and accurate positioning cannot be expected.

However, it is actually difficult to make both optical axes coincide with each other in terms of manufacturing. That is, it is possible to match the optical axis of the laser emitted from one side with the laser tube outer tube that houses both emission type laser tubes, but at the same time, the laser optical axis from the other side and the laser tube outer tube center It is actually impossible to match the axis.

Problems to be Solved by the Invention The purpose of the present invention is to provide a dual emission type laser optical axis adjusting device for eliminating such drawbacks of the prior art.

[Constitution of device]

Means for Solving the Problems In order to achieve the above-mentioned object, in the optical axis adjusting device of the present invention, two transparent identical wedge glasses are first opposed to the emitted laser beam to be corrected for the optical axis. It is formed so that the deviation angle θ of the laser optical axis is corrected by arranging the groups in parallel and rotating both of them. Next, since the deviation angle is corrected but the displacement (shift amount of the optical axis) still remains, one parallel plane glass is also provided facing the laser optical axis, and this is rotated, and the so-called tilt or parallel plane glass is further provided. The amount of displacement is corrected by adding the optical axis shift of.

Explaining further with reference to FIG. 1, the optical axis of the laser emitted downward from both emission type laser tubes (1) held in the outer tube of the laser tube (not shown) as shown by the arrow is the central axis Y of the outer tube. There is no need to correct the optical path because they can be matched, but the optical axis of the laser emitted upward has a deviation angle θ with respect to the Y axis, and this deviation angle θ is the refraction by the same wedge-shaped glass (2) and (3). And is adjusted so as to be parallel to the laser optical axis Y. However, the optical axis obtained here is x
Since it is displaced, displacement correction is further performed using the parallel flat glass (4). For this reason, the same wedge-shaped glass (2) and (3) can each be rotated 360 ° around the Y-axis so that the desired declination can be sufficiently corrected, and the parallel planes can be displaced to enable the displacement correction. The glass (4) can be rotated 360 ° and at the same time its optical axis shift can be applied in the direction of the arrow (x).

〔Example〕

FIG. 2 shows a cross-sectional view of an essential part of one embodiment, and the laser optical axis adjusting device of the present invention, which is provided with the same wedge-shaped glass (2) (3) and parallel plane glass (4), has an outer cylinder (5). It is mounted on a ring-shaped holding piece (6) fixed to the inside.
Then, a (lower) holding frame (7) for holding the wedge-shaped glass (2) is rotatably mounted on the holding piece (6), and the pin hole (10) provided in the holding frame (7) has a pin hole (10) (not shown). The wedge-shaped glass (2) is rotated by inserting the pin and operating it to rotate the holding frame (7). Further, in order to fix the holding frame (7) on the holding piece (6), a machine screw (not shown) screwed to the holding piece (6) is turned to hold the head of the holding frame (7). ) Is abutted to the outside of the holding frame (7), and preferably locked in a stop hole (11) provided outside the holding frame (7).

Similarly, the wedge-shaped glass (3) was held (upper part).
The holding frame (8) is rotatably and lockably placed on the holding frame (7), and the parallel flat glass holding frame (9) is rotatably and lockably placed on the holding frame (8), The plane-parallel glass (4) is held by the holding frame (9) by a known technique.

At this time, the parallel plane glass (4) is held so that its optical axis can be shifted in the rotation angle direction (α) as described above, and the shifting operation can be performed by using, for example, a mallet or the like. Adjust and fix by gently tapping the upper edge of the glass (4).

〔effect〕

As is clear from the above description, by using the optical axis adjusting device of the present invention, the deviation angle of the laser optical axis can be easily corrected only by rotating the wedge glass holding frame, and the deviation correction method by the parallel flat glass is used. Can be implemented very easily. Therefore, by simply mounting this device on one side of both emission type laser tubes in the outer casing of the laser tube, the coaxiality of both emission laser optical axes in the laser vertical unit and the laser projector can be guaranteed, so high precision is achieved. Can be positioned.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention, and FIG. 2 is a sectional view of the essential part of one embodiment. (2) ・ (3) …… Wedge-shaped glass, (4) …… Parallel flat glass, (7) ・ (8) ・ (9) …… (Wedge-shaped glass, parallel flat glass) holding frame, (10) ...... Pin hole.

Claims (1)

[Scope of utility model registration request] 1. A pair of identical wedge-shaped glasses are rotatably juxtaposed to each other so as to correct a declination of a laser optical axis emitted from both emission lasers, and the corrected laser optical axis is obtained. A dual emission type laser optical axis adjusting device in which parallel plane glass is rotatably and optical axis shiftable so as to correct the displacement of the optical axis.