Observation device
AssigneeMejiro 67 Inc.
InventorMakoto Uehara
Life of this patent
Estimating the term…
Abstract
An observation device capable of observing a subject plane. The observation device includes a light receiving surface and an imaging optical system for forming an image of light from the subject plane onto the light receiving surface. The imaging optical system includes a concave primary mirror, a secondary mirror, and a flat extraction mirror. The beam of the light from the subject plane is reflected at the concave primary mirror, the convex secondary mirror, and the concave primary mirror in the named order, after which an image of the beam is formed on the light receiving surface via the flat extraction mirror. The observation device changes an angle α and an angle β.
Claims4
An observation device comprising:
- a light receiving surface that receives light from a subject plane;
- and
- an imaging optical system that forms an image of the light from the subject plane on the light receiving surface, wherein
- the imaging optical system comprises an equimagnification reflective imaging optical system that includes a concave primary mirror, a convex secondary mirror, and a flat extraction mirror, and
- the imaging optical system reflects a beam of the light from the subject plane at the concave primary mirror, the convex secondary mirror, and the concave primary mirror in that order, and then forms the image on the light receiving surface via the flat extraction mirror;
- first tilting means that changes an angle α defined between first optical axis of light directed toward the concave primary mirror from the subject plane and a perpendicular line to the subject plane;
- and
- second tilting means that changes an angle β defined between second optical axis of light directed toward the light receiving surface from the flat extraction mirror and a perpendicular line to the light receiving surface.
Dependencies are inferred from the claim text.