Abstract:
Provided is an optical device capable of adjusting astigmatism due to a manufacturing error to attain excellent imaging performance while securing optical efficiency. The optical device includes: an imaging optical system including multiple lens arrays in an optical axis direction, the multiple lens arrays each including multiple lens units arrayed in a first direction perpendicular to the optical axis direction; a light source including multiple light-emitting points arrayed in the first direction; and first changing means for changing a first distance in the optical axis direction between the light source and one of the multiple lens arrays, which is closest to the light source. The imaging optical system is configured to: image the light source at equal magnification as an erecting image within a first cross-sectional plane including the optical axis direction and the first direction; and image, within a second cross-sectional plane perpendicular to the first direction, the light source at a magnification different from the magnification within the first cross-sectional plane.
Abstract:
An exposure device includes an element array that includes a plurality of organic electroluminescent elements and a lens array optical system that uses a lens array that includes a plurality of lenses, which forms images of light from the element array on a photosensitive body. In the exposure device, each electroluminescent element has a first electrode disposed on a light emitting side, a second electrode disposed on a light reflecting side, and a light emitting layer. In the exposure device, in each organic electroluminescent element, an optical path length L 1 between a light emitting position of the light emitting layer and the second electrode is an optical path length within ±10% of an optical path length at which variation in light amount during light exposure is minimized.
Abstract:
An optical apparatus includes: a light source including multiple light-emitting points arrayed in a first direction; and an imaging optical system including multiple lens optical systems arrayed in the first direction. The imaging optical system forms images of the multiple light-emitting points on a light-receiving face. In a first cross-section and in a second cross-section, half-value of a maximum value of angle of divergence of an imaging optical flux input to the light-receiving face, resolution, and a size of each image of the plurality of light-emitting points formed on the light-receiving face, satisfy predetermined conditions.
Abstract:
An imaging optical system includes a plurality of lens optical system rows each including a plurality of lens optical systems arranged in a first direction. The plurality of lens optical system rows are arranged in a second direction perpendicular to the first direction and to an optical axis direction. Each of the plurality of lens optical systems in each of the plurality of lens optical system rows is configured to form an erect equal-magnification image in a cross section perpendicular to the second direction and configured to form an inverted image in a cross section perpendicular to the first direction. In a cross section perpendicular to the optical axis direction,optical axes of the respective plurality of lens optical systems in adjoining ones of the plurality of lens optical system rows are separate from one another in the first direction and being located on a same line.
Abstract:
This invention provides an imaging optical system that can prevent blocking of a desired imaging light flux and prevent generation of unwanted ghost light. The imaging optical system includes: a first lens array that includes a plurality of lenses arrayed in a first direction and that forms an intermediate image of an object in a first section parallel to the first direction; a second lens array that includes a plurality of lenses arrayed in the first direction and that re-images the intermediate image of the object in the first section; and a light blocking member disposed between optical axes of adjacent lenses of the first and second lens arrays. At least one of the first and second lens arrays has a ghost light suppressing portion between adjacent lens surfaces. A width of the ghost light suppressing portion in the first direction is greater than a width in the first direction of the light blocking member.