OPTICAL APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE READING APPARATUS

摘要

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 surface. 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 surface, resolution, and a size of each image of the plurality of light-emitting points formed on the light-receiving surface, satisfy predetermined conditions.

主权项

1. An optical apparatus comprising:
a light source including a plurality of light-emitting points arrayed in a first direction; and an imaging optical system including a plurality of lens optical systems arrayed in the first direction; wherein the imaging optical system forms images of the plurality of light-emitting points on a light-receiving surface; and wherein conditions of0.8≤PmPs1-PsDs1-PmDmtanθmtanθs≤1.2[Math.1] are satisfied, where in a first cross-section which is parallel to the first direction and an axial direction of the lens optical systems, θm represents a half-value of a maximum value of angle of divergence of an imaging optical flux input to the light-receiving surface, Pm represents resolution, and Dm represents a size of each image of the plurality of light-emitting points, formed on the light-receiving surface, and in a second cross-section which is perpendicular to the first direction, θs represents a half-value of a maximum value of angle of divergence of an imaging optical flux input to the light-receiving surface, Ps represents resolution, and Ds represents a size of each image of the plurality of light-emitting points, formed on the light-receiving surface.