Lens mirror array, optical device, and image forming apparatus

An image forming apparatus, comprising:

• a lens mirror array configured to guide reflected light reflected from a document surface;
• a photoelectric conversion component configured to receive the reflected light reflected from the document surface and guided via the lens mirror array and output an image signal;
• and
• an image forming component configured to form an image based on the image signal output from the photoelectric conversion component,
• wherein the lens mirror array comprises a plurality of optical elements, the optical elements having optical axes of incident light thereon, the plurality of optical elements being arrayed in a direction orthogonal to the optical axes and parallel to a first positioning surface, each optical element comprising:
• an incident-side lens surface that refracts and converges incident light;
• a first reflection surface that reflects light made incident via the incident-side lens surface;
• a second reflection surface that reflects the light reflected by the first reflection surface;
• an emission-side lens surface that emits the light reflected by the second reflection surface;
• wherein each optical element comprises a center plane comprising the optical axis of incident light and an optical axis of the reflected light reflected by the first reflection surface, and the first positioning surface is orthogonal to the center plane,
• wherein the first positioning surface is disposed in parallel to the optical axis of the incident light in a position separated from the optical axis of the incident light by the first reflection surface;
• and
• a second positioning surface in a position that is further on a side of the lens mirror array of the emission-side lens surface than the first positioning surface along the optical axis of the incident light and is further separated from the optical axis of the incident light by the first reflection surface than the first positioning surface,
• wherein in the center plane, a primary third positioning surface continuously extends in a direction from the second positioning surface, and extends in a second direction opposite to a secondary third positioning surface that continuously extends in a first direction from the first positioning surface on a side, in the second direction, of the optical axis of the incident light, and
• wherein the primary third positioning surface and the secondary third positioning surface are disposed on the side, in the second direction, of the optical axis of the incident light in the center plane.