An optical system with an imaging center position invariant

Abstract

An optical system in which the center position of an image is constant. The emergent light rays L of an optical system A are divided into two light rays L1 and L2 at a certain position, each of which can form an image. An optical system B is given to the light rays L1 and an optical system C is given to the light rays L2. The part of the light rays in the optical system A which propagate along the optical axis is denoted by partL, which is composed of a plurality of light rays. The part of the light rays of partL which is divided into the optical system B is denoted by partL1 and the part of the light rays of partL which is divided into the optical system C is denoted by partL2. The propagation direction of the light rays of partL1 is adjusted so as to propagate along the optical axis of the optical system B and the propagation direction of the light rays of partL2 is adjusted so as to propagate along the optical axis of the optical system C. At this time, the center position of the image formed by the light rays L1 is constant and the center position of the image formed by the light rays L2 is also constant during the zooming process.

Description

Technical Field

[0001] Optical imaging. Background Technology

[0002] In a coaxial optical system, the image formed by light rays propagating along the optical axis lies on the extension of the optical axis. If the optical system is a zoom optical system, during zooming, the image formed by light rays propagating along the optical axis remains on the extension of the optical axis. The image formed by light rays propagating along the optical axis is usually the center of the image formed by the entire optical system. That is, the center position of the image does not change during zooming. Summary of the Invention

[0003] When we split the outgoing ray L of an optical system A into two rays L1 and L2, each forming an image, at a certain position, and assign an optical surface to ray L1 (equivalent to having its own independent optical system B), and assign an optical surface to ray L2 (equivalent to having its own independent optical system C), and one or more of optical systems A, B, and C form a zoom optical system, or optical systems A and B together form a zoom optical system, or optical systems A and C together form a zoom optical system, the center position of the image formed by ray L1 will change during the zoom process, and the center position of the image formed by ray L2 will also change. The portion of the ray propagating along the optical axis in optical system A is denoted as partL, and partL is composed of many rays. The portion of partL that is split into optical system B is denoted as partL1, and the portion of partL that is split into optical system C is denoted as partL2. By adjusting the propagation direction of ray partL1 so that it propagates along the optical axis of optical system B, and by adjusting the propagation direction of ray partL2 so that it propagates along the optical axis of optical system C, the center position of the image formed by ray L1 remains unchanged during zooming, as does the center position of the image formed by ray L2. Since the center positions of the two images formed by the two rays remain unchanged, the limited effective area of ​​the CMOS sensor can be better utilized during zooming. Attached Figure Description

[0004] Figure 1 This is a complete optical path diagram in its initial state; Figure 2 This is a schematic diagram of the complete optical path after zooming; Figure 3 A schematic diagram of the complete optical path after zooming in. Figure 4 A schematic diagram of the complete optical path when adjusting an optical system composed of refractive surfaces. Detailed Implementation

[0005] like Figure 1As shown. The outgoing ray L(2) of optical system A(1) is split into two rays L1(6) and L2(7) by optical surfaces Flect1(4) and Flect2(5) at position P(3). The characteristic of position P(3) is that any point on the optical path cross section at this position can theoretically receive the light reflected from various positions on the surface of the object and entering optical system A(1). There is a special ray partL(8) in optical system A(1), which propagates along the optical axis AxisA(15) of optical system A(1). When the outgoing ray L(2) of optical system A(1) is split into two rays L1(6) and L2(7) by optical surfaces Flect1(4) and Flect2(5) at position P(3), L1(6) should contain a part of the special ray partL(8), denoted as partL1(9); L2(7) should contain a part of the special ray partL(8), denoted as partL2(10). Optical surface Flect3 (11) changes the direction of light L1 (6) again and transmits it into optical system B (13), and optical surface Flect4 (12) changes the direction of light L2 (7) again and transmits it into optical system C (14).

[0006] Optical surfaces Flect1(4) and Flect3(11) form an orientation adjustment optical system AdjustB, and optical surfaces Flect2(5) and Flect4(12) form an orientation adjustment optical system AdjustC. By adjusting the angle between optical surfaces Flect1(4) and Flect3(11) and the optical axis AxisA(15), light ray L1(6) exits from AdjustB, and light ray partL1(9) propagates along the optical axis AxisB(16) of optical system B(13). By adjusting the angle between optical surfaces Flect2(5) and Flect4(12) and the optical axis AxisA(15), light ray L2(7) exits from AdjustC, and light ray partL2(10) propagates along the optical axis AxisC(17) of optical system C(14).

[0007] When one or more of optical systems A(1), B(13), and C(14) are zoom optical systems, or when optical system A(1) and optical system B(13) form a zoom optical system, or when optical system A(1) and optical system C(14) form a zoom optical system. Figure 2 , Figure 3As shown. During zooming, ray partL(8) propagates along the optical axis AxisA(15) in optical system A(1). When ray partL(8) is separated into ray partL1(9) and ray partL2(10), ray partL1(9) propagates along the optical axis AxisB(16) in optical system B(13), and ray partL2(10) propagates along the optical axis AxisC(17) in optical system C(14). Therefore, the propagation direction of ray partL1(9) in optical system B(13) does not change, and the propagation direction of ray partL2(10) in optical system C(14) does not change. The position of the image formed by ray partL1(9) does not change, and the position of the image formed by ray partL2(10) does not change. Furthermore, the center position of the image formed by ray L1(6) does not change, and the center position of the image formed by ray L2(7) does not change.

[0008] Figure 1 In the example, the adjusting optical system AdjustB consists of two reflective surfaces, and the adjusting optical system AdjustC consists of two reflective surfaces. In actual operation, the adjusting optical system AdjustB can also consist of multiple reflective surfaces, and the adjusting optical system AdjustC can also consist of multiple reflective surfaces.

[0009] like Figure 4 As shown, the adjusting optical system AdjustB can also be composed of a refractive surface (18) and a refractive surface (20), or multiple refractive surfaces, or multiple reflective and refractive surfaces, as long as partL1 (9) propagates along the optical axis AxisB (16) when it enters the optical system B (13). The adjusting optical system AdjustC can also be composed of a refractive surface (19) and a refractive surface (21), or multiple refractive surfaces, or multiple reflective and refractive surfaces, as long as partL2 (10) propagates along the optical axis AxisC (17) when it enters the optical system C (14).

Claims

1. An optical system with an invariant imaging center position, characterized in that: The optical system consists of multiple sub-optical systems, which can be divided into optical system A, optical system B, optical system C, adjustment optical system AdjustB, and adjustment optical system AdjustC. The optical system A is characterized in that: A is a coaxial optical system, and a portion of the light rays incident on A propagates along the optical axis of A, denoted as partL; The adjustment optical system AdjustB is characterized in that: AdjustB can be composed of two or more reflective surfaces, or two or more refractive surfaces, or a combination of reflective and refractive surfaces; AdjustB is located at a specific position P in the direction of the outgoing light L of A, changes the direction of a specific part L1 of the outgoing light L of A, and emits L1 along a specific direction Direct1. The specific position P is characterized in that: theoretically, any point on the optical path cross section at this position can receive the light rays reflected from various positions on the surface of the object being photographed and entering the optical system A; The specific part L1 is characterized in that: L1 must contain a part partL, denoted as partL1; The specific direction Direct1 is characterized in that: Direct1 coincides with the optical axis of the optical system B; The optical system B is characterized in that: the optical system B is a coaxial optical system; The adjustment optical system AdjustC is characterized in that: AdjustC can be composed of two or more reflective surfaces, or two or more refractive surfaces, or a combination of reflective and refractive surfaces; AdjustC changes the direction of a specific part L2 of the outgoing light L of A at a specific position P in the direction of the outgoing light L of A, and emits L2 along a specific direction Direct2. The specific part L2 is characterized in that: L2 must contain a part partL, denoted as partL2; The specific direction Direct2 is characterized in that: Direct2 coincides with the optical axis of the optical system C; The optical system C is characterized in that: the optical system C is a coaxial optical system.

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