Optical scanner and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsKeiichi Serizawa, Yasumasa Tomita
Life of this patent
Estimating the term…
Abstract
An optical scanner for writing an electrostatic latent image on an image carrier includes a scanning optical system that forms an optical scanning path, a pair of optical detecting units arranged at two positions on the optical scanning path for detecting a write-start position and a write-end position to measure a time for scanning from the write-start position to the write-end position, and an optical housing that houses at least the scanning optical system and the optical detecting units. The optical detecting units are mounted on the optical housing via an intermediate member having a thermal expansion coefficient smaller than that of the optical housing.
Claims7
An optical scanner in an image forming apparatus, comprising:
- a scanning optical system that forms an optical scanning path;
- a pair of optical detecting units arranged at two positions on the optical scanning path for detecting a write-start position and a write-end position to measure a time for scanning from the write-start position to the write-end position;
- and
- an optical housing that houses at least the scanning optical system and the optical detecting units, wherein
- the optical detecting units are mounted on the optical housing via an intermediate member having a thermal expansion coefficient smaller than that of the optical housing.
An image forming apparatus comprising:
- an optical scanner that includes
- a scanning optical system that forms an optical scanning path;
- a pair of optical detecting units arranged at two positions on the optical scanning path for detecting a write-start position and a write-end position to measure a time for scanning from the write-start position to the write-end position;
- and
- an optical housing that houses at least the scanning optical system and the optical detecting units, wherein the optical detecting units are mounted on the optical housing via an intermediate member having a thermal expansion coefficient smaller than that of the optical housing;
- an image forming unit that includes an image carrier, forms a toner image by developing an electrostatic latent image written on the image carrier with a toner, and transfers the toner image onto a recording medium;
- and
- a fixing unit that fixes the toner image transferred on the recording medium.
Dependencies are inferred from the claim text.