Large-area scanning hologram camera system utilizing a separate light-gathering unit

Abstract

The present invention relates to a large-area scanning hologram camera system utilizing a separate light-gathering unit. According to the present invention, a large-area scanning hologram camera system is provided that includes: a scan beam generation unit which modulates the phase of a first beam separated from a light source and converts it into a first curvature beam through a first beam curvature generation unit, converts a second beam into a second curvature beam through a second beam curvature generation unit, and then interferes the first and second curvature beams to form a scan beam; a scan unit which receives the scan beam as an ingress and projects it onto an object, and controls the scanning position of the scan beam relative to the object in the horizontal and vertical directions to transmit it to the object; a projection unit which includes a scan lens and an imaging lens system and projects the scan beam transmitted from the scan unit onto the object surface where the object is located; and at least one light-gathering unit which is provided outside the projection unit on a different optical axis from the projection unit and detects the beam reflected from the object. According to the present invention, a large-area scanning hologram camera with high resolution can be realized.

Claims

1. A scan beam generation unit modulates the phase of the first beam separated from the light source and converts it into a first curvature beam through a first beam curvature generation unit, converts the second beam into a second curvature beam through a second beam curvature generation unit, and then interferes the first and second curvature beams to form a scan beam. A scanning unit for receiving the scan beam and projecting it onto an object, and for controlling the scanning position of the scan beam relative to the object in the horizontal and vertical directions and transmitting it to the object, A projection unit that includes a scanning lens and an imaging lens system, and projects the scan beam transmitted from the scanning unit onto the object surface on which the object is located, At least one light-gathering unit is provided outside the projection unit on a different optical axis from the projection unit, and detects the beam reflected from the object, A large-area scanning hologram camera system, including [specific feature / feature].

2. The aforementioned light-gathering unit is A focusing lens system is provided on a different optical axis from the projection unit, and into which the beam reflected from the object is received. A photodetector that detects the beam that has passed through the aforementioned focusing lens system, The large-area scanning hologram camera system according to claim 1, including the following:

3. The aforementioned light-gathering unit is With respect to the optical axis of the projection unit and the object surface as a reference,

4. Multiple light-gathering units are provided around the projection unit, with each unit having a different optical axis. The large-area scanning hologram camera system according to claim 1, wherein electrical signals for multiple beams detected from the multiple light-gathering units are combined through a signal merging processor and then transmitted to a PC for hologram image processing, or electrical signals for multiple beams detected from the multiple light-gathering units are transmitted to a PC for signal merging and hologram image processing.

5. The aforementioned imaging lens system is The large-area scanning hologram camera system according to claim 1, wherein the scan beam pattern that has reached the imaging surface of the imaging lens system is imaged onto the surface of an object where the object is located.

6. The scanning unit is The large-area scanning hologram camera system according to claim 1, wherein the scan beam having an optical axis inclined with respect to the optical axis of the scan lens is transmitted to the field surface of the scan lens by the scan angle of the x-scan unit and y-scan unit that control the scanning position in the horizontal and vertical directions.

7. When the field plane of the scanning lens and the imaging plane of the imaging lens system are in the same position, the large-area scanning hologram camera system according to claim 1 satisfies the following formula:

8. The large-area scanning hologram camera system according to claim 1 satisfies the following formula when the positions of the field plane of the scanning lens and the imaging plane of the imaging lens system are different and separated by a set distance:

9. The large-area scanning hologram camera system according to claim 1, wherein the field size of the field surface of the scanning lens is determined by the front focal length of the scanning lens and the scanning angle through the following formula:

10. The projection unit is, The large-area scanning hologram camera system according to claim 1, further comprising an optical axis conversion lens disposed between the scanning lens and the imaging lens system to align the optical axes of the scanning lens and the imaging lens system.

11. The projection unit is, A first structure comprising a telecentric type scan lens having a ray angle of 0° in the field plane, an optical axis conversion lens, and an imaging lens system having a ray angle of 0° or more for the principal ray in the imaging plane. A second structure comprising the telecentric type scan lens, the optical axis conversion lens, and an imaging lens system in which the ray angle of the principal ray is 0° or less on the imaging plane. A third structure comprising a scan lens having a ray angle of 0° or more on the field plane, the optical axis conversion lens, and an imaging lens system having a ray angle of 0° or more for the principal ray on the imaging plane. A fourth structure comprising a scan lens having a ray angle of 0° or more on the field plane, the optical axis conversion lens, and an imaging lens system having a ray angle of 0° or less on the imaging plane for the principal ray, A fifth structure comprising a scan lens with a ray angle of 0° or less on the field plane, the optical axis conversion lens, and an imaging lens system with a ray angle of 0° or more on the imaging plane for the principal ray, and The large-area scanning hologram camera system according to claim 10, which is embodied in a structure selected from a sixth structure including a scanning lens having a ray angle of 0° or less on the field plane, an optical axis conversion lens, and an imaging lens system having a ray angle of 0° or less on the imaging plane.

12. When the field plane of the scanning lens and the object plane of the optical axis conversion lens are in the same position, the large-area scanning hologram camera system according to claim 10 satisfies the following formula:

13. The large-area scanning hologram camera system according to claim 10 satisfies the following formula when the positions of the field plane of the scanning lens and the object plane of the optical axis conversion lens are different and separated by a set distance:

14. When the imaging plane of the optical axis conversion lens and the imaging plane of the imaging lens system are in the same position, the large-area scanning hologram camera system according to claim 10 satisfies the following formula:

15. The large-area scanning hologram camera system according to claim 10 satisfies the following formula when the imaging surface of the optical axis conversion lens and the imaging surface of the imaging lens system are at different positions and separated by a set distance:

Images