JPS6041499B2 - Emitter or receiver optical axis adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical axis adjustment device for a projector or receiver;
For example, the present invention relates to an alarm device in which a light projector and a light receiver are disposed facing each other, in which visible light from the projector or a visible light source is used to facilitate optical axis adjustment.

Conventionally, when a visible light projector is used as this type of alarm device, it has the advantage of giving a warning effect or the disadvantage that the presence of the alarm device becomes obvious. and invisible light.

In addition, when installing the emitter and receiver, the optical axes of the emitter 5 and the receiver are aligned, and the optical axis of the emitter 5 and the receiver is aligned, and then the optical axis is aligned with the wall surface of the entrance, exit, passage, etc. When using a visible light emitter, the optical axis must be visible This makes it easy to separate the beam from the receiver, but when using an invisible light emitter, conventional methods have been used to align the optical axis by visually checking a string stretched between the emitter and the receiver. ing. However, this method requires an optical axis alignment device such as a sighting device that stretches the thread.
If the installation location is high or narrow, it becomes difficult to use the aiming device, and if the distance between the projector and receiver is long, the thread becomes loose, resulting in low accuracy. For this reason, a reflector plate is installed between the front lens of the emitter or receiver body and the emitter or receiver element, and this reflector allows the optical axis to align with the optical axis of the emitter or receiver body, which is arranged facing each other. A method of reflecting light and adjusting the optical axis while observing this light is also being explored, but with this method, the position of the reflector is shifted from the focal point of the front lens, so
It has the disadvantage that it is difficult to determine the best point of the optical axis and adjustment is difficult.

The present invention was made in view of the above-mentioned drawbacks, and a peephole is formed on the side surface between the light projecting element or the light receiving element on the optical axis and the front lens, and the peephole is optically opposed to and coincides with the optical axis. A reflective object that reflects the light and introduces it into the peephole is provided at the spot position of the front lens, and a focus mark is provided on this reflective object to indicate the point that coincides with the light beam. By concentrating the light from a reflective object onto a point and aligning the focal point and optical axis at one point, the optical axis can be adjusted easily and with high accuracy, and the distance between opposing emitters or receivers can be reduced. To provide an optical axis adjustment device for a projector or a light receiver, which can reliably adjust the optical axis regardless of whether it is short or long. Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

Reference numeral 1 denotes a mounting board, and this mounting board 1 (only one side is shown in the drawing) is attached to an opposite position of an object to be mounted such as a structure (not shown), and the main body 2 of the emitter or receiver is faced to this mounting board 1. and attach it.

The diameter of the base end of the main body 2 is enlarged, and this base end is airtightly attached to the mounting board 1 via a packing 3. Further, a threaded cylinder 4 is provided on the upper part of the enlarged-diameter stepped portion 2a of the main body 2. The screw cylinder 4 has an open end and projects toward the inner rear.
Reference numeral 5 denotes a wiring board, which is provided in a sliding pattern in the vertical direction along vertical guide grooves 6 formed on both sides of the main body 2;
Approximately at the center of the wiring board 5 in parentheses on a vertical line orthogonal to the light beam, there is a light emitting element such as an infrared light emitting diode, a phototransistor, a light receiving element 7 such as a solar cell, and a mirror body with a reflective surface tilted downward. Reflective objects 8 are attached above and below each other.

In addition, there is a mounting hole 5 extending vertically in the upper part of this set-up board 5.
A is formed in the mounting hole 5a, and the wiring board 5 is fixed to the main body 2 by tightening a screw 9 that is threaded into the vertical screw 4 into this mounting hole 5a. Reference numeral 10 denotes a front lens, which focuses on the element 7 and the reflective object 8 on the optical axis, and has a locking protrusion 1 near the front end of the main body 2.
It is locked and attached at 1.

Further, an acrylic plate 12 with good translucency is attached to the front end of the main body 2, located on the front side of the front lens 10, and provided with a cross-shaped sight (not shown) that coincides with the optical axis. Further, a peephole 13 is formed on the lower side of the main body 3, located between the reflective object 8 and the front lens 10.

Then, the light that coincides with the optical axis is reflected by the reflective object 8 placed on the optical axis, and this light is introduced into the peephole 13. Further, the reflective object 8 has a second
As shown in the figure, a cross-shaped sight 14 is provided which serves as a focus mark that coincides with the optical axis.

Next, the operation of this embodiment will be explained.

Loosen the screws 9, and while sliding the wiring board 5 vertically along the guide groove 6, align the reflective object 8 with the optical axis and position it on the optical axis (Fig. 1), then tighten the screws 9 to remove the wiring board. 5 to the main body 2.

In the case of a light emitter that emits visible light that is installed opposite to this main body 2, or a light emitter or receiver that emits invisible light, visible light is generated by a visible light source placed at the installation location of this emitter or light receiver. When the light is projected, the light passes through the front lens 10 and is focused on the reflective object 8.

If you look into the reflective object 8 through the peephole 13 of the main body 2 in this state, the visible light from the opposing emitter or receiver will be observed as a single point of light on the reflective object 8, and this light and the sight 14 of the reflective object 8 will be observed. Adjust the optical axis so that they align at the - point, and fix the main body 2.

When the light from the projector is to be received by the receiver, loosen the screw 9, slide the wiring board 5, position the element 7 on the optical axis as shown in FIG. to fix the wiring board 5. Note that in this embodiment, an element 7 is provided on the wiring board 5.
and a reflective object 8 are provided above and below each other, and this wiring board 5
Although the structure is such that the element 7 or the reflective object 8 is selectively positioned on the optical axis by moving the wiring board 5, the element 7 and the reflective object 8 can also be provided in horizontal positions with respect to each other. It is also possible to have a structure in which the position is set by rotating.

Next, another embodiment will be described with reference to FIGS. 4 to 8.
Reference numeral 5 denotes a wiring board 5 having a light emitting element or a light receiving element 7 attached to the center thereof, and a reflective object 8 is attached to the center of a mounting plate 16 which is separate from the wiring board 5.

Further, a pair of support bins 16, 16 protruding in the front-rear direction are attached to the upper portions of the wiring board 5 and the reflective object 8, respectively. Further, a connector 17 having a pair of insertion holes in the front and back direction for connecting the pair of support bottles 16, 16 is fixed to the upper part of the expansion step portion 2a of the main body 2 via a support plate 18. A support stand 19 for supporting the lower part of the temporary wiring 5 or the mounting plate 15 is fixed to the lower part of the stepped portion 2a via a support plate 20.

Then, the wiring board 5 or the honor plate 15 is attached to the support bin 16.
, 16 are inserted into the insertion hole of the connector 17 and suspended, and when the lower part is supported and fixed on the support stand 19, the element 7 or the reflective object 8 is on the optical axis and on the front lens 1.
The position coincides with the zero focus.

The other configurations are the same as those in FIGS. 1 to 3 above.

In such a structure, when adjusting the optical axis of the emitter or receiver, attach the reflector 15 with the reflective object 8 attached inside the main body 2 using the connector 17, and remove the mounting plate 15 during actual use. The wiring board 5 with the element 7 attached thereto is attached and used.

Further, other embodiments will be described with reference to FIGS. 9 and 10.

A wiring board 5 is fixed to the enlarged stepped portion 2a of the main body 2, and a light projecting element or a light receiving element 7 is mounted approximately at the center of the wiring board 5, which coincides with the optical axis.

Reference numeral 21 denotes an adapter that is detachably connected to the front end of the main body 2 and can be used in the front-rear direction.A transparent acrylic plate 1 is provided with a cross-shaped sight that coincides with the optical axis on the front.
2 is attached to the back side of this acrylic plate 12, and the front lens 10 is attached to the back side of the acrylic plate 12 by being locked with a locking protrusion 11 projecting inward.

Then, the adapter 21 is slid onto the front end of the main body 2, and at the position where the locking protrusion 11 and the front end of the main body 2 are engaged, the focal point of the front lens 10 is aligned with the element 7. It's supposed to match.

Further, a peephole 13 is formed on one side of the main body 2, located between the element 7 and the front lens 10.

Further, an engagement hole 22 is formed on one side of the main body 2 in the vicinity of the broadside step 2a, and an insertion hole 23 is formed on the side of the pond at a position away from the widening step 2a. . Furthermore, 8 is a flat reflective object such as a mirror, and this reflective object 8
An engagement protrusion 8a is provided at the center of the green tip of the protrusion.

This reflective object 8 is inserted through the insertion hole 23 of the main body 2, and its engaging protrusion 8a is engaged with the engaging hole 22, and the reflecting plate 16 is attached to the main body 2 in an inclined manner. 7 and the front lens 10 on the optical axis and the above-mentioned peep hole 13
The light beam is arranged optically opposite to the light ball, and the light matching the light ball is reflected and this light is introduced into the peephole 13. Further, this reflective object 8 is provided with a cross-shaped sight 14 that serves as a focus mark that coincides with the light beam. 0 Also, by sliding the adapter 21 forward,
This adapter 21 allows the focal point of the front lens 10 to be focused on the sight 14 of the reflective object 8 without blocking the peephole 13.
It is adjustable to match.

The other configurations are the same as those in FIGS. 1 to 3 above.

Next, to explain the operation of this embodiment, when adjusting the optical axis, the reflecting object 8 is attached to the main body 2 as shown in FIG. Adjust the optical axis so that it matches the sight 14 of the object 8, and in actual use, remove the reflective object 8 from the main body 2 as shown in FIG. It is used in a state where it is engaged with the front end surface of 2.

Further, still another embodiment will be described with reference to FIGS. 11 and 12.

Reference numeral 1 denotes a mounting board, and this mounting board 1 is placed at a position opposite to an object to be mounted such as a structure (not shown) (only one side is shown in the drawing).
and the main body 2 of the projector or receiver is mounted on the mounting board 1 facing each other.

The proximal end of the main body 2 is widened, and the proximal end is airtightly attached to the mounting board 1 via a packing 3. Further, a wiring board 5 made of a transparent material with good transparency is fixed to the enlarged diameter stepped portion 2a of the main body 2. A light projecting element such as an infrared light emitting diode or a light receiving element 7 such as a phototransistor or a solar cell is attached to the rear side of the wiring board 5 and approximately at the center on the optical axis. Also, the element 7 is attached to the back end of the main body 2, facing the element 7 on the optical axis. A concave mirror 24 with the same focus is attached.

Reference numeral 25 denotes an adapter that is detachably connected to the front end of the main body 12, and a transparent acrylic plate 12 with a cross-shaped sight aligned with the optical axis is attached to the front side. A front lens 10 is attached to the rear side by being fixed with a stopper projection 11.

Further, a small iron fitting part 26 is formed on the rear end side of the adapter 25 to be inserted into the front opening ○ part of the main body 2, and a plurality of locking protrusions are formed on the outer surface side of this iron fitting part 26. 27 are provided in a protruding manner, and a plurality of locking holes 28 for locking each of the locking protrusions 27 are formed near the front end of the main body 2. Also,
A peephole 13 is formed in one side of the adapter 25, located behind the front lens 10. Also,
An engagement hole 29 is formed in the negative side of the adapter 25 near the fitting part 26, and an insertion hole 3-0 is formed in the other side at a position away from the iron fitting part 26. Furthermore, 8 is a flat reflective object such as a mirror, and this reflective object 8
An engaging protrusion 8a is protruded from the center of the green tip.

This reflective object 8 is inserted into the insertion hole 25 of the adapter 25.
The reflective object 8 is inserted obliquely into the adapter 25, and the reflective object 8 is placed on the optical koji and connected to the peep hole 13 and the optical They are arranged to face each other and reflect light that coincides with the optical axis and introduce this light into the peephole 13. Moreover, this reflective object 8 is located at the focal point of the front lens 10, and a cross-shaped sight 14 is provided as a focus mark representing the focal point position. Further, reference numeral 31 denotes an acrylic plate holding shell that is removably attached to the front end of the main body 2. By sandwiching the peripheral part of the acrylic plate 12 between this holding shell 31 and the front end surface of the main body 2, the acrylic plate 12 is attached to the main body 2. Next, the operation of this embodiment will be explained.

The adapter 25 is installed by iron-fitting the joint part 26 of the adapter 25 to the front part of the main body 2, and elastically engaging the locking protrusion 27 in the locking hole 28.

Next, the reflective object 8 is inserted through the insertion hole 30 of the adapter 25, and the engaging protrusion 8a is engaged with the engaging hole 29, so that the reflective object 8 is inserted into the main body 2.
Attach to. In the case of a light emitter that emits visible light that is placed opposite to the main body 2, or a light emitter or receiver that emits invisible light, the visible light source placed at the location where this emitter or light receiver is installed. , when visible light is projected, this light passes through the front lens 10 and is focused on the reflective object 8.

If you look into the reflective object 8 through the peephole 13 of the main body 2 in this state, the visible light from the opposing emitter or receiver will be observed as a single point of light on the reflective object 8, and this light and the sight 14 of the reflective object 8 will be observed. Adjust the optical axis so that they align at one point, and fix the main body 2.

When using the receiver to receive light from a projector, remove the adapter 25 from the main body 2, remove the front lens 10 and the reflective object 8 from the main body 2, and attach the acrylic plate 12 to the front of the main body 2. Arrived acrylic board holder 31
be subject to Europe. When this main body 2 is used as a light projector, visible light or invisible light emitted from the light projecting element 7 is reflected by the concave mirror 24, passes through the wiring board 5 and the acrylic board 12, and is projected onto the light receiving element of the opposing light receiver. be illuminated.

Further, in the case of a light receiver, visible light or invisible light projected from the light projecting element of the opposing light projector passes through the acrylic plate 12 and the wiring board 5, is reflected by the concave mirror 24, and is collected on the light receiving element 7.

According to the present invention, a peephole is formed on the side surface between the light projecting element or the light receiving element on the optical axis and the front lens, and the peephole is optically opposed to the peephole to reflect light that matches the optical pulp. The reflective object to be introduced into the hole is placed at the focal point of the front lens, and a focus mark is provided on the reflective object in the bracket to indicate the point that coincides with the optical axis. By looking through the peephole at the collected light and adjusting the angle of the main body to match the focus mark, the optical axis can be aligned with the optical axis, making it easy to adjust the optical axis. Since alignment is performed at a single point, accuracy is increased, and optical axis adjustment can be performed reliably regardless of whether the distance between opposing emitters or receivers is short or long.

Further, the reflective object and the light emitting element or the light receiving element can be selectively positioned at the focal point by providing the reflective object and the light emitting element or the light receiving element so that they can slide or rotate on the same plane, or by attaching and detaching the reflective object and the light emitting element or the light receiving element. Therefore, the device is also compact and has a simple structure, making it easy to change the device when adjusting the optical axis and during actual use. In addition, the reflective object can be attached and detached between the light emitting element or the light receiving element and the front lens, and the front lens can be moved so that its focal point coincides with the reflective object and the element, so the position of the reflective object can be freely selected. Moreover, since it is separated from the above-mentioned element, the mounting structure of the above-mentioned element can be fixed and simplified.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view showing an embodiment of the device of the present invention during optical axis adjustment, Fig. 2 is a front view of a reflective object, Fig. 3 is a longitudinal sectional side view during actual use, and Fig. 4 is a vertical sectional side view during optical axis adjustment. FIG. 5 is a side view of the wiring board, FIG. 6 is a front view of the same, FIG. 7 is a side view of the mounting plate, and FIG. 8 is a front view of the same.
FIG. 9 is a cross-sectional plan view during optical axis adjustment showing still another embodiment, FIG. 10 is a cross-sectional plan view during actual use, and FIG. 11 is a cross-sectional plan view during optical axis adjustment showing still another embodiment. FIG. 12 is a cross-sectional plan view of the same in actual use. 2... Main body, 7... Light emitting element or light receiving element, 8... Reflective object, 10... Front lens, 13... Peephole , 14... Aim that becomes the focus V point mark. Hair diagram Figure 2 Figure 6 Figure 7 Figure 3 Frequent figure Gu figure Frequent figure Figure 2

Claims (1)

[Scope of Claims] 1. A main body provided with a light emitting element or a light receiving element and a front lens facing the above element on the optical axis, a peephole formed on a side surface between the above element and the front lens, and a peephole formed in the side surface between the above element and the front lens, and a peephole formed in the side surface between the above element and the front lens; is located at the focal point of the front lens and is disposed optically opposite to the peephole, and reflects light that coincides with the optical axis and introduces this light into the peephole and points at a point that coincides with the optical axis. What is claimed is: 1. An optical axis adjustment device for a projector or a light receiver, comprising: a reflective object provided with a focus mark. 2. A patent characterized in that a reflective object and a light projecting element or a light receiving element are movably provided on the same plane in a main body, and the reflective object and the element can be selectively positioned at a focal point. An optical axis adjustment device for a projector or a light receiver according to claim 1. 3. The reflective object and the light projecting element or the light receiving element are each removably attached to the main body, and the reflective object and the element can be selectively attached to a focal point. Optical axis adjustment device for emitter or receiver. 4. Claim 1, characterized in that the reflective object is detachably attached between the light emitting element or the light receiving element and the front lens, and the front lens is movable so that its focus coincides with the reflective object and the element. Optical axis adjustment device for the emitter or receiver as described in . 5. A main body provided with a concave mirror on the optical axis, a light emitting element or a light receiving element facing the concave mirror, and a front lens, a peephole formed in the side surface between the element and the front lens of the main body, and the element and the front surface. A point located between the lenses at the focal point of the front lens and operatively facing the peephole, which reflects light that coincides with the optical axis and introduces this light into the peephole and coincides with the optical axis. 1. An optical axis adjustment device for a projector or a light receiver, characterized in that the front lens and the reflective object are detachably attached to each other, and the front lens and the reflective object are detachable.