JPH06258566A - Optical axis adjusting device - Google Patents

Abstract

PURPOSE:To surely fix a holder holding a prism at a position of final adjustment after adjusting the optical axis by the optical axis adjusting device having the prism for optical path control. CONSTITUTION:The holder 1 holding the prism 3 is provided with a restoring property by a first coil spring 14, and three pieces of adjusting screws 13 screwed thereto are screwed therein in a vertical direction, by which the holder 1 is adjusted in elevation. The holder can be fixed in the state of adjusting its elevation direction by the friction force of the contact surfaces of three pieces of the adjusting screws 13 with the holder 1. The sure optical axis adjustment is thus executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device capable of securely fixing a holder having a prism for refracting an incident optical path at an arbitrary position after adjusting it in the elevation direction and the horizontal rotation direction.

[0002]

2. Description of the Related Art A conventional optical axis adjusting device is shown in FIGS. In the figure, reference numeral 1 denotes a holder, which is located on a base 2 for fixing the final adjustment position. Reference numeral 3 is a prism for refracting an incident optical path, 4 is a first rotation shaft pin which serves as a rotation center when the horizontal rotation direction of the holder 1 is changed, and 5
Is a first eccentric pin for changing the horizontal rotation direction of the holder 1 around the first rotation shaft pin 4, and 6 is a first eccentric pin for fixing the holder 1 and the base 2 after adjusting the horizontal rotation direction. 1 is a fixing screw, 7 is a second fixing screw for fixing the holder 1 and the base 2, and 8 is a second fixing screw for changing the elevation direction of the housing 9 with the second rotation shaft pin 10 as the center of rotation. An eccentric pin, 11 is a third fixing screw for fixing the holder 1 to the holder 1 after adjusting the vertical direction, and 12 is a fourth fixing screw for fixing the holder 9 to the holder 1 after adjusting the vertical direction. .

Next, the operation will be described. In FIG. 10, by the first rotary shaft pin 4 and the first eccentric pin 5,
The holder 1 is adjusted in the horizontal rotation direction, and the holder 1 is attached to the base 2 by the first fixing screw 6 and the second fixing screw 7.
Fixed to. Next, the housing 9 is adjusted in the vertical direction by the second rotary shaft pin 10 of the vertical rotary shaft and the second eccentric pin 8, and the third fixing screw 11 and the fourth fixing screw 1 are adjusted.
Although it is fixed to the holder 1 by means of 2, there is a gap between the holder 1 and the housing 9 for adjusting the elevation, as shown in FIG. When fixing with the screw 11 and the fourth fixing screw 12,
There was a deviation from the adjusted position and it was impossible to make an accurate adjustment.

[0004]

Since the conventional optical axis adjusting device is constructed as described above, the third fixing screw 11 and the fourth fixing screw 11 are adjusted after the optical axis is adjusted in the vertical direction. When fixing the holder 1 and the housing 9 with the screw 12, there is a problem that a slight optical axis deviation is inevitably generated.

This occurrence is made in order to solve the above-mentioned problems, and the holder for holding the prism is made to have a restoring property, and the vertical direction adjusting screw is provided to fix the prism at the same time as the adjustment. Eliminate the misalignment of the optical axis. Another object of the present invention is to obtain an optical axis adjusting device free from optical axis misalignment by performing optical axis adjustment by pushing and pulling a block that comes in contact with a holder having resilience and fixing it.

[0006]

In the optical axis adjusting device of the first embodiment of the present invention, a housing for holding a conventional prism and a holder for adjusting the elevation direction are integrated, and the holder further comprises a holder. It is designed to have an adjusting screw that provides resilience, can be adjusted up and down, and can be fixed.

Further, in the optical axis adjusting device of the second embodiment of the present invention, a conventional housing for holding the prism and a holder for adjusting the elevation direction are integrated, and a coil spring is used to improve the resilience. Give it. Then, by pushing and pulling the block that comes into contact with the cutout portion of the holder, the upper and lower directions can be adjusted and fixed.

Furthermore, in the optical axis adjusting device of the third embodiment of the present invention, a housing for holding the conventional prism and a holder for adjusting the elevation direction are integrated, and a leaf spring is used to restore. To be given. Then, by pushing and pulling the block that comes into contact with the cutout portion of the holder, the upper and lower directions can be adjusted and fixed.

[0009]

In the first embodiment of the optical axis adjusting device according to the present invention, the holder for holding the prism is made to have the restoring property by the coil spring, and this is moved in the elevation direction using the adjusting screw to adjust each adjustment. Due to the frictional force between the screw and the contact surface of the holder, the holder position can be fixed at the same time while adjusting the elevation direction, and the adjustment of the optical axis becomes reliable.

Further, in the second embodiment of the optical axis adjusting device according to the present invention, the holder for holding the prism is made to have the restoring property by the coil spring, and the notch of the holder is contacted with the wedge-shaped block, This is pushed up and down by pushing and pulling the adjusting screw that is screwed to the base. At this time, the adjustment screw, the wedge-shaped block, and the combination that does not cause the clearance of the notch portion of the holder can be securely fixed at the adjustment position.

Furthermore, in the third embodiment of the optical axis adjusting device according to the present invention, the holder for holding the prism is provided with W.
A leaf spring having a V-shape is used to provide resilience, a wedge-shaped block is brought into contact with the notch of this holder, and this is pushed up and down by pushing and pulling the adjustment screw that is screwed to the base. . At this time, the adjustment screw, the wedge-shaped block, and the combination that does not cause a gap in the notch of the holder can be securely fixed at the adjustment position.

[0012]

【Example】

Example 1. A first embodiment of the present invention will be described below with reference to the drawings. 1, 2 and 3, 1 is a holder,
The prism 3 is located above the base 2 for fixing the final adjustment position and for refracting the incident optical path. 4-
7 is the same as the conventional optical axis adjusting device. Reference numeral 13 is an adjusting screw that is screw-fitted to the holder 1 and adjusts the elevation direction by abutting against the holder 1. Reference numeral 14 is a first coil fixed to a notch portion of the holder 1 and imparting resilience to the holder 1. It is a spring.

In the optical axis adjusting device constructed as described above, the first rotating shaft pin 4 and the first eccentric pin 5 adjust the holder 1 in the horizontal rotating direction. After this,
The holder 1 is fixed to the base 2 by the first fixing screw 6 and the second fixing screw 7. Next, the adjusting screw 13 screwed into the holder 1 holding the prism 3 is attached to the holder 1
Screw up to the contact portion 1b with. Due to the friction between the screw fitting portion 1c of the holder 1 of the three adjustment screws and the contact portion 1b of the holder 1, the holder 1 to which the resilience is given by the first coil spring 14 is adjusted in the elevation direction. Moreover, due to the mutual tension of the adjusting screws 13, they are fixed as they are in the elevation direction. By doing so, the optical axis adjustment can be reliably performed.

Example 2. A second embodiment of the present invention will be described below with reference to the drawings. In FIGS. 4, 5 and 6,
A holder 1 is located on a base 2 for fixing the final adjustment position, and holds a prism 3 for refracting the incident optical path. 4 to 7 are the same as the conventional optical axis adjusting device. Reference numeral 13 is an adjusting screw which is screw-fitted to the holder 1 and abuts on the notch of the holder 1 which is provided with resilience by the first coil spring 14, and pushes and pulls the block 15 for adjusting the elevation direction. 16 is a holder 1 and a block 15
Is a second coil spring that is fixed to the block 15 and imparts a restoring property in the pushing direction of the block 15.

In the optical axis adjusting device configured as described above, the first rotating shaft pin 4 and the first eccentric pin 5 adjust the holder 1 in the horizontal rotating direction. After this,
The holder 1 is fixed to the base 2 by the first fixing screw 6 and the second fixing screw 7. Next, the block 15 that is in contact with the notch of the holder 1 that holds the prism 3 is pushed and pulled by the adjusting screw 13 that is screw-fitted to the holder 1. The upper inner surface 1a of the cutout portion of the holder 1 and the upper inclined surface 15a of the block 15 contact the lower inner surface 1b of the cutout portion of the holder 1 and the lower inclined surface 15b of the block 15, and the holder 1 is pushed and pulled by pushing and pulling the adjusting screw 13. , It is adjusted in the elevation direction. At this time, the first coil spring 14 is fixed inside the notched portion of the holder 1 and follows the pushing condition of the block 15. Then, by the combination of the adjusting screw 13, the block 15 and the holder 1 without a gap,
It can be securely fixed at the adjustment position.

Embodiment 3. A third embodiment of the present invention will be described below with reference to the drawings. In FIGS. 7, 8 and 9, 1
Is a holder, which is located on the base 2 for fixing the final adjustment position and holds the prism 3 for refracting the incident optical path. 4 to 7 are the same as the conventional optical axis adjusting device. Reference numeral 13 is an adjusting screw which is screw-fitted to the holder 1 and abuts on the notch of the holder 1 to push and pull the block 15 for adjusting the elevation direction. 16 is a holder 1 and a block 15
A second coil spring that is fixed to the block 15 and imparts a restoring property in the pushing direction of the block 15. Reference numeral 17 denotes a leaf spring having a W-shape that is fixed to the cutout portion of the holder 1 and gives the holder 1 a restoring property.

In the optical axis adjusting device constructed as described above, the first rotating shaft pin 4 and the first eccentric pin 5 adjust the holder 1 in the horizontal rotating direction. After this,
The holder 1 is fixed to the base 2 by the first fixing screw 6 and the second fixing screw 7. Next, the block 15 that is in contact with the notch of the holder 1 that holds the prism 3 is pushed and pulled by the adjusting screw 13 that is screw-fitted to the holder 1. The upper inner surface 1a of the cutout portion of the holder 1 and the upper inclined surface 15a of the block 15 contact the lower inner surface 1b of the cutout portion of the holder 1 and the lower inclined surface 15b of the block 15, and the holder 1 is pushed and pulled by pushing and pulling the adjusting screw 13. It is adjusted in the elevation direction. At this time, the W-shaped leaf spring 17 is fixed inside the notched portion of the holder 1 and follows the pushing condition of the block 15. Then, the adjustment screw 13, the block 15, and the holder 1 can be securely fixed at the adjustment position by a combination without a clearance.

[0018]

As described above, according to the first embodiment of the present invention, when adjusting the elevation direction, the resilience imparted by the coil spring of the holder and the adjusting screw screwed into the holder are used. , The movement of the up and down directly responds to the screwing amount of the screw, and due to the friction between the three adjusting screws and the holder at that time, it can be fixed in the state where the up and down direction is adjusted, and the optical axis is adjusted. However, there is an effect that it becomes certain.

Further, according to the second embodiment of the present invention, when adjusting the elevation direction, the operation of adjusting the elevation direction of the block is performed by the contact between the inner surface of the notch of the holder and the slope of the block for elevation adjustment. It continuously responds to the pushing amount, and due to the friction of the screw fitting part between the adjustment screw that pushes and pulls the block and the holder, and the contact pressure between the block and the inner surface of the notch of the holder, the vertical direction remains adjusted. There is an effect that it can be fixed in the state and the optical axis adjustment becomes reliable.

According to the third embodiment of the present invention,
When adjusting the elevation direction, the inner surface of the notch of the holder comes into contact with the slope of the elevation adjustment block, so the operation to adjust in the elevation direction continuously corresponds to the pushing amount of the block and pushes and pulls the block. Due to the friction of the screw fitting portion between the adjusting screw and the holder and the contact pressure between the block and the inner surface of the notch of the holder, it can be fixed in the state of adjustment in the elevation direction. Since the W-shaped leaf spring that gives the holder resilience is positioned in the direction perpendicular to the three blocks to be pushed and pulled and in a strip shape, a strong contact pressure is generated, Even if the block is pushed or pulled, the friction is evenly applied, and the optical axis can be adjusted reliably.

[Brief description of drawings]

FIG. 1 is a diagram showing an optical axis adjusting device according to a first embodiment of the present invention.

FIG. 2 is a detailed view of an adjusting screw portion in FIG.

FIG. 3 is a detailed view of a holder cutout portion and a first coil spring attached state in FIG.

FIG. 4 is a diagram showing an optical axis adjusting device according to a second embodiment of the present invention.

5 is a diagram showing a lifting mechanism of the holder in FIG.

FIG. 6 is a plan view of FIG.

FIG. 7 is a diagram showing an optical axis adjusting device according to a third embodiment of the present invention.

FIG. 8 is a view showing the elevation mechanism of the holder in FIG.

9 is a plan view of FIG. 7. FIG.

FIG. 10 is a diagram showing a conventional optical axis adjusting device.

11 is a detailed view of the elevation mechanism of the holder in FIG.

[Explanation of symbols]

 1 Holder 2 Base 3 Prism 4 First Rotating Shaft Pin 5 First Eccentric Pin 6 First Fixing Screw 7 Second Fixing Screw 8 Second Eccentric Pin 9 Housing 10 Second Rotating Shaft Pin 11th 3 fixing screw 12 4th fixing screw 13 adjustment screw 14 1st coil spring 15 block 16 2nd coil spring 17 leaf spring

Claims (3)

[Claims] 1. A prism for refracting an incident optical path, a holder for holding the prism, an adjusting screw for changing the elevation direction of the holder and holding it at an arbitrary position,
A first eccentric pin for changing the horizontal rotation direction of the holder, a first rotation shaft pin serving as a center during rotation, a base for holding the holder, and a first fixing for fixing the holder and the base. An optical axis adjusting device comprising a screw and a second fixing screw. 2. A prism for refracting an incident optical path, a holder for holding the prism, a block for changing the elevation direction of the holder, and an adjusting screw for pushing and pulling the block horizontally. A second coil spring fixed to this block for producing the horizontal restoring property of the block, a base holding the holder,
A first coil spring fixed to the notch of the holder to provide resilience, a first eccentric pin for changing the horizontal direction of the holder, a first rotating shaft pin serving as a center during rotation, and a holder. An optical axis adjusting device, comprising: a first fixing screw for fixing the base and the base; and a second fixing screw similarly. 3. A prism for refracting an incident optical path, a holder for holding the prism, a block for changing the elevation direction of the holder, an adjusting screw for pushing and pulling the block horizontally, and A second coil spring that is fixed to the block to provide the resilience of the block, a base that holds the holder, and a horizontal W-shaped leaf spring that is fixed to the notch of the holder to provide the resilience. A first eccentric pin for changing the direction, a first rotating shaft pin that serves as a center during rotation, a first fixing screw for fixing the holder and the base, and a second fixing screw of the same are provided. An optical axis adjusting device provided with.