OFF-AXIS INFRARED OPTICS WITH A CONCEPT OF ASYMMETRIC FIELD OF VIEW

摘要

The present invention relates to an off-axis infrared optical system with a concept of an asymmetric field of view. The area of the surface of the area, which is a monitoring criterion on the entire image screen, is vertically positioned below the center of an image to cause a monitoring image screen (20) of a ski area, whereby the attention is focused to occupy a relatively wide area, thus improving the monitoring effects. The position of the surface of the sea in regards to an object to be monitored is made by adjusting an incidence angle of infrared rays received to an object lens (7). By including an object lens adjuster (10) with an installation angle (x) coupled to the object lens (7), a vertical field of view above the surface of the sea can be made wide while making a vertical field of view below the surface of the sea of little interest narrow with respect to the incidence angle of the infrared rays. More specifically, a reference surface of the sea can be moved to a desired position with a field of view of the off-axis infrared optical system, thereby efficiently adjusting the field of view of a region of interest, reducing a load on the optical design, and improving performance.