Optical film and optical imaging system

An optical imaging system, comprising an optical film and an image generator, wherein the image generator is configured to generate an image light beam and make the image light beam be incident into the optical film from a first lens layer, the optical film is configured to reflect a part of the image light beam to a field-of-view direction and guide the image light beam reflected by a windshield to a first direction, the field-of-view direction is different from the first direction, and the optical film comprises at least a first lens layer, a first deflection layer, a reflection layer, a second deflection layer, and a second lens layer that are sequentially stacked,

• wherein the second lens layer is attached to the windshield;
• the first lens layer is configured to amplify an image light beam and transmit the amplified image light beam to the first deflection layer;
• the first deflection layer is configured to deflect the amplified image light beam and transmit the deflected image light beam to the reflection layer;
• the reflection layer is configured to reflect and transmit the deflected image light beam, the deflected image light beam reflected by the reflection layer forms a first reflected light beam, and the first lens layer and the first deflection layer are configured to amplify and/or deflect the first reflected light beam, so as to guide the first reflected light beam to the field-of-view direction;
• and
• the deflected image light beam transmitted by the reflection layer passes through the second deflection layer and the second lens layer, and is reflected by the windshield to form a second reflected light beam;
• the second lens layer and the second deflection layer are configured to amplify and/or deflect the second reflected light beam, so as to guide the second reflected light beam to the first direction different from the field-of-view direction.