摘要:
A small-sized, bright, high-performance viewing optical system comprising an eyepiece optical system having a decentered prism and a reflection image display unit, wherein the display unit (3) includes a light source (4) and an illuminating light guide prism (6) for guiding light from the light source (4) so as to allow the light to illuminate the display screen from the front side thereof, the eyepiece optical system includes a prism (10) having an incident surface (13) for directing light reflected from the display screen into the prism through an illuminating light guide prism (6), a reflecting surface (12), and an exit surface (11) for allowing the light to exit from the prism, the at least one of the reflecting surface is decentered with respect to the optical axis and formed into a rotational asymmetric curve for correcting the decentration aberration and giving power, and an image is guided to the position of a pupil (2) under the condition that the distance between the incident surface (13) and the display screen fulfills a predetermined condition. An image display comprising such a viewing optical system is also disclosed.
摘要:
This specification discloses an optical system in which rays of light from an object pass through a first lens unit having at least one off-axial curved surface, a second lens unit and a third lens unit having at least one off-axial curved surface in the named order and wherein chiefly the first lens unit and the third lens unit cancel aberrations created by the off-axial curved surfaces with each other so that totally good aberration correction may be effected.
摘要:
A small optical system that is capable of widening an angle of view is provided. This optical system is provided with a first surface having a reflecting action and a second surface that reflects a light beam reflected on this first surface toward the first surface again. Then, a principal ray at central angle of view that is made incident on the first surface again is reflected and travels to a side opposite to a side of the last time it was reflected from the first surface with respect to a normal line of a surface at a hit point thereof.
摘要:
An optical element (100) has a plurality of reflecting regions (R3,R4,R5) for reflecting light in succession, each of the plurality of reflecting regions comprises a curved surface, at least two of the reflecting regions (R3,R5) have a common reflecting surface, and the optical paths of the light defined by the plurality of reflecting regions overlap one another.
摘要:
A re-imaging optical system (10) has a reflective objective (12) providing an intermediate image of the object being viewed and a relay (14) including refractive (32, 62) and diffractive (34, 72) optical elements. The system is capable of re-imaging the intermediate image onto an image plane (16) with the characteristic advantages of reflective and refractive systems while eliminating their deficiencies.