JPS594257Y2 - Light beam detector - Google Patents

Description

[Detailed description of the invention] This invention is based on the light receiving part 1 of a light beam detector that can be rotated vertically and horizontally.
An optical axis adjuster 2 is removably attached between the light receiving element 19 and the light receiving element 19, and a reflecting mirror 3 is installed inside the optical axis adjuster 2 at an angle of inclination of 45° with respect to the optical axis of incidence on the light receiving element 19. Reflector 3
A cylindrical finder 5 is mounted on one side wall of the optical axis adjuster 2, facing the
The object of the present invention is to provide a light beam detector which is provided at right angles to the optical axis of incidence on the light-receiving element 19, and whose purpose is to provide a light beam detector in which the optical axis can be easily aligned. .

The present invention will be explained in detail below with reference to the illustrated embodiments.

The light beam detector is composed of a light projector (not shown) and a detector main body 6. On the upper front side of the detector main body 6, a light receiving part 1 having a light receiving lens 7 is mounted on a supporting piece so as to be rotatable vertically and horizontally. 9 and a support frame 10, and below the light receiving section 1 is a housing 11 containing a light receiving element 19 facing directly upward.
is the provision.

A through hole 12 is bored in the center of the horizontal upper surface 8 of the housing 11, and a pair of locking pieces 13, 13 for locking the optical axis adjuster 2 are protruded from both sides of the hole 12.

The optical axis adjuster 2 has an upward opening, and a reflecting mirror 3 attached to a cross-shaped sight 4 is installed inside the optical axis adjuster 2 at an angle of 45° with respect to the optical axis of incidence on the light receiving element 19 to receive light. The optical axis of incidence on the element 19 is made to coincide with this sight 4.

Further, a cylindrical finder 5 is provided on one side wall of the optical axis adjuster 2 facing the reflecting mirror 3 at right angles to the optical axis of incidence on the light receiving element 19, and on both sides of the bottom of the optical axis adjuster 2. A pair of flanges 14, 14 that fit into the locking pieces 13.13 of the housing 11 project outward.

Therefore, when aligning the optical axis, the flange 14 of the optical axis adjuster 2
, 14 are fitted to the locking pieces 13.13 and attached to the detector body 6, and the optical axis A emitted from the projector is received by the light receiving section 1, and the light is received while looking through the cylindrical finder 5 with the eye 17. Part 1
When the optical axis B reflected from the light receiving section 1 is aligned with the aim 4 of the reflecting mirror 3 by moving it vertically and horizontally, light enters the eye 17.

After that, the optical axis adjuster 2 is removed.The optical axis B from the light receiving section 1 is
accurately reaches the light receiving element 19 and is sensed.

In this embodiment, the locking pieces 13, 13 are provided on the housing, and the flanges 14, 14 are provided on the optical axis adjuster 2, so that the optical axis adjuster 2 can be easily positioned and installed.

In other embodiments shown in FIGS. 3 and 4, the cylindrical finder 5 is particularly long to narrow the field of view, and the optical axis adjuster 2
The body has a substantially cubic shape, the reflecting mirrors 3 are arranged substantially diagonally, and parallel protrusions 18 and 18 are provided on the upper surface of the housing 11 to which the optical axis adjuster 2 is fitted.

Note that 19 is a light receiving element. Also, a frame 1 as shown in FIG.
6 may be used for fitting the optical axis adjuster 2.

FIG. 6 shows the detector main body 6 mounted near the corner of the wall surface 15.15, as seen from the direction of arrow C.

Conventional light beam detectors use a wide optical axis width and align the optical axis in a straight line by visual measurement, but when the optical axis width is widened, the light from the projector is too diffused, making it difficult to detect long distances. Furthermore, when a rechargeable detector is installed near a corner of a wall, it is difficult to align the optical axis even by visual measurement.

In this invention, as described above, an optical axis adjuster with a cylindrical finder is installed, so even if the field of view is limited by the cylindrical finder and the optical axis width is narrow, the optical axis can be aligned. This allows you to align the optical axis while looking through the finder and checking the position of the light receiving element without moving the position of your eye.
Since the reflector is installed at an angle of inclination of 5°, when the light from the light receiving part hits the eye, it can be confirmed that the incident light is accurately entering the light receiving element, and the optical axis is Since the adjuster is detachably attached, it can be attached so that it can be viewed from any direction, and the optical axis can be aligned even when the photoelectric detector is attached near a corner of a wall surface.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, FIG. 2 is a partial sectional view of the same, and FIG. 3 is a front view of another embodiment of the present invention.
FIG. 4 is a partial sectional view of the same as above, FIG. 5 is a partial perspective view of still another embodiment, and FIG. 6 is a top view of an example of use, in which 1 is a light receiving section, 2 is an optical axis adjuster, and 3 is a top view of an example of use. 5 is a reflecting mirror, 5 is a cylindrical finder, and 19 is a light receiving element.

Claims (1)

[Scope of utility model registration request] An optical axis adjuster is removably attached between the light-receiving part of the light beam detector, which can be rotated vertically and horizontally, and the light-receiving element, and a reflector is installed within the optical axis adjuster at a angle of 45° with respect to the optical axis of incidence on the light-receiving element. A light beam detector comprising a cylindrical finder installed at an angle of inclination of .degree. and a cylindrical finder on one side wall of an optical axis adjuster facing a reflecting mirror and perpendicular to the optical axis of incidence on the light receiving element.