SCANNING OPTICAL APPARATUS AND METHOD FOR MANUFACTURING REFLECTION MEMBER

摘要

A scanning optical apparatus includes: a deflection unit configured to deflect a light flux from a light source in a main scanning direction; an incident optical system configured to introduce the light flux from the light source to the deflection unit; a condensing optical system configured to condense the light flux from the deflection unit onto a scanned surface; and a reflection member arranged in a light path of the light flux deflected in the main scanning direction by the deflection unit and configured to reflect a part of the deflected light flux. The reflection member has a reflection surface configured to reflect the deflected light flux, a first end surface formed in the main scanning direction, and a second end surface formed in a sub-scanning direction perpendicular to the main scanning direction, and the second end surface has a higher degree of corrosion resistance than the first end surface.

主权项

1. A scanning optical apparatus comprising:
a deflection unit configured to deflect a light flux from a light source in a main scanning direction; an incident optical system (2, 3, 4) configured to introduce the light flux from the light source to the deflection unit; a condensing optical system (6) configured to condense the light flux from the deflection unit onto a scanned surface; and a reflection member (9) arranged in a light path of the light flux deflected in the main scanning direction by the deflection unit and configured to reflect a part of the deflected light flux, wherein the reflection member has a reflection surface configured to reflect the deflected light flux, a first end surface formed in the main scanning direction, and a second end surface formed in a sub-scanning direction perpendicular to the main scanning direction, and the second end surface has a higher degree of corrosion resistance than the first end surface.