TWI866211B - Optical system and adjusting device thereof - Google Patents

Abstract

The invention provides an optical system and an adjusting device thereof. The optical system includes an optical device. The adjusting device is configured to adjust the location of a center of the optical device. The adjusting device includes a first adjusting element, a second adjusting element and a third adjusting element. The first adjusting element is movable along a first axis and is propped against the optical device. The second adjusting element is movable along a second axis and is propped against the optical device. The third adjusting element is movable along a third axis and is propped against the optical device. The intersection between the first axis and any one of the second axis and the third axis is spaced from the center of the optical device.

Description

Optical system and its adjustment device

The present invention relates to an optical system and an adjustment device thereof.

In general optical systems, some or all of the optical components are usually coaxial. How to adjust the position of the optical components to make them have a precise coaxial relationship and thus improve the yield of the product is indeed an important topic.

In view of this, the main purpose of the present invention is to provide an optical system that uses an adjustment device to adjust the position of its optical elements, which has the advantages of simple adjustment method, large adjustable range, improved product yield and reduced production cost.

The optical system of the present invention includes an optical device, and the adjustment device is used to adjust the position of the center of the optical device. The adjustment device includes a first adjustment member, a second adjustment member and a third adjustment member. The first adjustment member can move along a first axis and abut against the optical device. The second adjustment member can move along a second axis and abut against the optical device. The third adjustment member can move along a third axis and abut against the optical device. The intersection of the first axis and the second axis is at a distance from the center of the optical device, and the second axis is coaxial or non-coaxial with the third axis.

Or the adjustment device includes a first adjustment member, a second adjustment member and a third adjustment member. The first adjustment member can move along a first axis and abut against the optical device. The second adjustment member can move along a second axis and abut against the optical device. The third adjustment member can move along a third axis and abut against the optical device. The intersection of the first axis and any of the second axis or the third axis is at a distance from the center of the optical device.

The first axis passes through the center of the optical device, the first axis is a horizontal line, and the center of the optical device is located outside the second axis, the second axis is a vertical line, and the second adjustment member moves in the same direction or in the opposite direction as the third adjustment member.

Wherein, the first axis passes through the center of the optical device, the second axis coincides with the third axis, and the center of the optical device is located outside the second axis and the third axis, and the second axis and the third axis are perpendicular lines.

The optical system includes a plurality of optical elements, the aforementioned adjustment device, and an optical device. The optical elements have an optical axis, and the first, second, and third adjustment members are moved along their respective axes, so that the optical device is coaxial with the optical elements.

The optical device includes a transmissive display screen and a support to support the transmissive display screen. The first, second and third adjustment members are all in contact with the support to adjust the center position of the transmissive display screen. The support includes an arc surface, and the first adjustment member is in contact with the arc surface. There is a third tangent plane between the arc surface and the first adjustment member. The third tangent plane has a first angle with the first axis, and the first angle is about 90 degrees.

The support further includes a first cylindrical member and a second cylindrical member, the central axes of the first and second cylindrical members are parallel to the optical axis, and the second and third adjustment members abut against the surfaces of the first and second cylindrical members respectively.

Wherein, the first cylindrical member and the second cylindrical member are pins, and the second adjustment member and the third adjustment member are adjustment screws.

There is a first tangent plane between the first cylindrical member and the second adjusting member, and there is a second tangent plane between the second cylindrical member and the third adjusting member. The first, second and third adjusting members are moved along their respective axes so that the normal of the first tangent plane, the normal of the second tangent plane and the first axis intersect at the center of the optical device; wherein the first tangent plane and the second axis have a second angle, the second tangent plane and the third axis have a third angle, and the second angle and the third angle are not 90 degrees.

The optical elements include an objective lens set and an eyepiece set, the optical device includes a transmissive display screen, and the objective lens set, the transmissive display screen and the eyepiece set are arranged in sequence along the optical axis.

In order to make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the following specifically cites preferred embodiments and provides detailed descriptions with the accompanying drawings.

10:Optical system

11: Objective lens set

13: Prism set

15: Optical device

17: Eyepiece set

19: Adjustment device

151: Seat

153: Transparent display screen

191: First adjustment piece

193: Second adjustment piece

195: Third adjustment piece

1511: Arc surface

1513: First cylindrical part

1515: Second cylindrical part

A1: First axis

A2: Second axis

A3: The third axis

C: Center

L: optical axis

N1, N2, N3: force

S1, S2: center axis

T1: First tangent plane

T2: Second tangent plane

T3: The third tangent plane

θ1: first angle

θ2: Second angle

θ3: The third angle

Figure 1 is a schematic diagram of the basic structure of one embodiment of the optical system of the present invention.

Figure 2 is a cross-sectional view of an optical device according to one embodiment of the optical system of the present invention.

Figure 3 shows the geometric relationship between the optical device and the adjustment device in Figure 2.

Please refer to FIG. 1, which is a basic schematic diagram of one embodiment of the optical system of the present invention. In this embodiment, the optical system 10 is a rangefinder telescope, including an objective lens group 11, a prism group 13, an optical device 15, and an eyepiece group 17 and other optical elements. These optical elements are arranged in sequence from the object side to the image side along an optical axis L. Please also refer to FIG. 2, the aforementioned optical device 15 includes a transmissive display screen 153 and a support 151, and the support 151 is used to support the transmissive display screen 153.

When the optical system 10 is in operation, ambient light from the object side can sequentially pass through the objective lens group 11, the prism group 13, the transmissive display screen 153 and the eyepiece group 17 to reach the user's eyes, so that the user can observe a target object (not shown). On the other hand, the distance measuring light can be emitted by a light emitter (not shown) and reach the target object through the prism group 13 and the objective lens group 11, or reflected by the target object (not shown) and reach a light receiver (not shown) through the objective lens group 11 and the prism group 13. The time difference between light emission and light reception is used to calculate the distance of the target object (not shown), and then the distance information is displayed on the transmissive display screen 153 for the user's reference.

It is worth noting that the optical system 10 of the present invention is not limited to the range-finding telescope shown in FIG. 1. In some other embodiments, the prism assembly 13 is not provided.

Due to factors such as assembly errors, the central axis of the optical device 15 may not be consistent with the optical axis L. Therefore, the present invention provides an adjustment device 19, as shown in Figure 2, for adjusting the position of the optical device 15 so that the central axis of the optical device 15 is consistent with the optical axis L, that is, the optical device 15 is coaxial with the objective lens group 11, the prism group 13 and the eyepiece group 17, so as to improve the assembly yield and product quality of the optical system 10. The relevant structure is described in detail as follows:

The adjustment device 19 includes a first adjustment member 191, a second adjustment member 193 and a third adjustment member 195. In this embodiment, the first adjustment member 191, the second adjustment member 193 and the third adjustment member 195 are all adjustment screws.

A protrusion is provided on one side of the support 151 of the optical device 15, and the protrusion has an arc surface 1511, and a first cylindrical member 1513 and a second cylindrical member 1515 are provided on the other two opposite sides of the support 151, wherein the central axes of the first and second cylindrical members 1513 and 1515 are parallel to the optical axis L. In this embodiment, the first cylindrical member 1513 and the second cylindrical member 1515 are both pins.

The first adjusting member 191, the second adjusting member 193 and the third adjusting member 195 are respectively in contact with the arc surface 1511, the first cylindrical member 1513 and the second cylindrical member 1515. During the adjustment operation, the first adjusting member 191 can move bidirectionally along the first axis A1, the second adjusting member 193 can move bidirectionally along the second axis A2, and the third adjusting member 195 can move bidirectionally along the third axis A3. In other words, the second adjusting member and the third adjusting member move in the same direction or in the opposite direction, thereby adjusting the position of the center C of the optical device 15. As mentioned above, the first adjustment member 191, the second adjustment member 193 and the third adjustment member 195 are all adjustment screws in this embodiment, so it can be understood that each adjustment screw is correspondingly arranged in a screw hole, wherein the outer thread of the adjustment screw is screwed with the inner thread of the screw hole, so when the adjustment screw is rotated, the adjustment screw can use the thread structure to move forward or backward (i.e., move in both directions) along the first axis A1, the second axis A2 and the third axis A3 to adjust the position of the center C of the optical device 15.

It is worth noting that in this embodiment, the first axis A1 is a horizontal line, and the second axis A2 and the third axis A3 are vertical lines. The central axis S1 of the first cylindrical member 1513 is perpendicular to the second axis A2, and the central axis S2 of the second cylindrical member 1515 is perpendicular to the third axis A3.

It is also worth noting that in the present embodiment, the first axis A1 passes through the center C of the optical device 15, the second axis A2 coincides with the third axis A3, and the position of the center C of the optical device 15 is outside the second axis A2 and the third axis A3, but the present invention is not limited to this. For example, the second axis A2 and the third axis A3 are parallel but do not coincide with each other. As long as the intersection of the first axis A1 and the second axis A2 is separated from the center C of the optical device 15 by a distance, and the intersection of the first axis A1 and the third axis A3 is also separated from the center C of the optical device 15 by a distance, it can be used to adjust the position of the center C of the optical device 15. It can also be understood that when the second axis A2 coincides with the third axis A3, the second adjustment member 193 can move along the first direction of the second axis A2 and abut against the optical device 15, and the third adjustment member 195 can move along the second direction of the second axis A2 and abut against the optical device 15, thereby adjusting the position of the center C of the optical device 15, wherein the second direction is toward the first direction, and the first direction is also toward the second direction.

Please refer to FIG. 3, which shows the geometric relationship between the optical device and the adjustment device in FIG. 2. As mentioned above, the first adjustment member 191 abuts against the arc surface 1511, so there is a third tangent plane T3 between the first adjustment member 191 and the arc surface 1511, the second adjustment member 193 abuts against the first cylindrical member 1513, so there is a first tangent plane T1 between the second adjustment member 193 and the first cylindrical member 1513, and the third adjustment member 195 abuts against the second cylindrical member 1515, so there is a second tangent plane T2 between the third adjustment member 195 and the second cylindrical member 1515. During the adjustment operation, the first adjusting member 191 moves horizontally along the first axis A1, the second adjusting member 193 moves vertically along the second axis A2, and the third adjusting member 195 moves vertically along the third axis A3. It is worth noting that the first adjusting member 191 The contact points with the arc surface 1511, the contact points between the second adjustment member 193 and the first cylindrical member 1513, and the contact points between the third adjustment member 195 and the second cylindrical member 1515 are not fixed, that is to say, the contact points will change with the optical The position of the device 15 is different. In this case, the first tangent plane T1, the second tangent plane T2 and the third tangent plane T3 will change with the change of the contact point. In this embodiment, the first tangent plane T1 and the second axis A2 have a second angle θ2 and the second angle θ2 is not 90 degrees, the second tangent plane T2 and the third axis A3 have a third angle θ3 and the third angle θ3 is not 90 degrees, and the third tangent plane T3 and the first axis A1 have a first angle θ1 and the first angle θ1 is approximately 90 degrees.

During the adjustment operation, the second adjustment member 193 applies a force N2 to the optical device 15, and the direction of the force N2 is perpendicular to the first tangent plane T1. The third adjustment member 195 applies a force N3 to the optical device 15, and the direction of the force N3 is perpendicular to the second tangent plane T2. The first adjustment member 191 applies a force N1 to the optical device 15, and the direction of the force N1 is perpendicular to the third tangent plane T3. The forces N1, N2, and N3 are used to move the optical device 15 in the horizontal and vertical directions until the center C of the optical device 15 coincides with the optical axis L. At this time, the three forces N1, N2, and N3 are just balanced and intersect at the center C of the optical device 15 (the normal of the first tangent plane T1, the normal of the second tangent plane T2, and the first axis A1 will intersect at the center C of the optical device 15), so that the center C of the optical device 15 remains on the optical axis L.

From the above description, it can be seen that the present invention does not directly apply a vertical force to the optical device 15 to change the vertical position of the optical device 15, but uses the second adjustment member 193 and the third adjustment member 195 in an eccentric manner to match the first cylindrical member 1513 and the second cylindrical member 1515 to change the direction of the force. This structure has the advantages of simple adjustment method, large adjustable range, improved product yield and reduced production cost.

The embodiments of the present invention described above are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

15: Optical device

19: Adjustment device

151: Seat

153: Transparent display screen

191: First adjustment piece

193: Second adjustment piece

195: Third adjustment piece

1511: Arc surface

1513: First cylindrical part

1515: Second cylindrical part

A1: First axis

A2: Second axis

A3: The third axis

C: Center

S1, S2: center axis

Claims (10)

An adjustment device for adjusting the position of the center of an optical device, comprising: a first adjustment member, movable along a first axis and abutting against the optical device; a second adjustment member, movable along a second axis and abutting against the optical device; a third adjustment member, movable along a third axis and abutting against the optical device; wherein the first axis passes through the center of the optical device; wherein the intersection of the first axis and the second axis is at a distance from the center of the optical device, and the second axis is coaxial or non-coaxial with the third axis. An adjustment device for adjusting the position of the center of an optical device, comprising: a first adjustment member, movable along a first axis and abutting against the optical device; a second adjustment member, movable along a second axis and abutting against the optical device; a third adjustment member, movable along a third axis and abutting against the optical device; wherein the first axis passes through the center of the optical device; wherein the intersection of the first axis and any of the second axis or the third axis is at a distance from the center of the optical device. An adjustment device as described in item 1 or 2 of the patent application, wherein the first axis is a horizontal line, and the center of the optical device is located outside the second axis, the second axis is a vertical line, and the second adjustment member moves in the same direction or in the opposite direction as the third adjustment member. As described in item 2 of the patent application scope, the second axis coincides with the third axis, and the center of the optical device is located outside the second axis and the third axis, and the second axis and the third axis are perpendicular lines. An optical system, comprising: a plurality of optical elements having an optical axis; an adjustment device and an optical device as described in any one of items 1 to 4 of the patent application scope; wherein the optical device is made coaxial with the optical elements by moving the first, second and third adjustment members along their respective axes. As described in item 5 of the patent application, the optical device includes a transmissive display screen and a support to support the transmissive display screen, the first, second and third adjustment members are all in contact with the support to adjust the center position of the transmissive display screen; wherein the support includes an arc surface, the first adjustment member is in contact with the arc surface, wherein a third tangent plane is provided between the arc surface and the first adjustment member, the third tangent plane and the first axis have a first angle, and the first angle is approximately 90 degrees. As described in item 6 of the patent application scope, the support seat further includes a first cylindrical member and a second cylindrical member, the central axes of the first and second cylindrical members are parallel to the optical axis, and the second and third adjustment members are respectively in contact with the surfaces of the first and second cylindrical members. The optical system as described in item 7 of the patent application, wherein the first cylindrical member and the second cylindrical member are pins, and the second adjustment member and the third adjustment member are adjustment screws. As described in item 7 of the patent application, there is a first tangent plane between the first cylindrical member and the second adjusting member, and there is a second tangent plane between the second cylindrical member and the third adjusting member, and the first, second, and third adjusting members are moved along their respective axes so that the normal of the first tangent plane, the normal of the second tangent plane, and the first axis intersect at the center of the optical device; wherein the first tangent plane and the second axis have a second angle, and the second tangent plane and the third axis have a third angle, and the second angle and the third angle are not 90 degrees. An optical system as described in item 5 of the patent application, wherein the optical elements include an objective lens set and an eyepiece set, the optical device includes a transmissive display screen, and the objective lens set, the transmissive display screen and the eyepiece set are arranged in sequence along the optical axis.

Images