Optical system, optical apparatus, imaging apparatus, and method for manufacturing optical system and imaging apparatus

An optical system that forms an image of an object, the optical system comprising:

• a light incident surface on which light from an object side is incident;
• a first reflector that reflects the light having passed through the light incident surface;
• and
• a second reflector that reflects the light reflected off the first reflector,
• wherein the following conditional expression is satisfied:
• 10.00°<ω
• where ω:
• half angle of view of the optical system.

An optical system that forms an image of an object, the optical system comprising:

• a light incident surface on which light from an object side is incident;
• a first reflector that reflects the light having passed through the light incident surface;
• and
• a second reflector that reflects the light reflected off the first reflector,
• wherein the space in an optical path between the first reflector and the second reflector is filled with a light transmissive member having a refractive index,
• the light incident surface is formed at an object-side, light incident surface of the light transmissive member,
• a reflection surface as the first reflector is formed at an image-side surface of the light transmissive member that is a surface on which the light having passed through the light incident surface is incident,
• a reflection surface as the second reflector is formed at the object-side surface of the light transmissive member that is a surface on which the light reflected off the first reflector is incident,
• a light exiting surface which is the image-side surface of the light transmissive member, on which the light reflected off the second reflector is incident, and via which the light exits out of the light transmissive member is formed, and
• the reflection surface of the second reflector is disposed in a position closer to the object side than the light incident surface when viewed in a direction perpendicular to an optical axis of the optical system.

An optical system comprising:

• a first reflector having a reflection surface that reflects light incident thereon;
• and
• a second reflector having a reflection surface that reflects the light reflected off the first reflector reflection surface,
• wherein light from an object is incident on and reflected off the first reflector reflection surface, the light reflected off the first reflector reflection surface is incident on and reflected off the second reflector reflection surface and is then reflected again off the first reflector reflection surface, and the light reflected off the first reflector reflection surface is then incident again on the second reflector reflection surface, then exits out of the optical system, and forms an image of the object.

A method for manufacturing an optical system that forms an image of an object, the optical system including a light incident surface on which light from an object side is incident, a first reflector that reflects the light having passed through the light incident surface, and a second reflector that reflects the light reflected off the first reflector,

• wherein the optical system is so disposed that the following conditional expression is satisfied:
• TL<15.0 mm
• where TL:
• distance from a surface closest to the object side in the optical system to an image plane in a direction of an optical axis that intersects the image plane.