(under the class definition) Subject matter including a transparent optical element having at least two plane surfaces inclined relative to each other, from which light is reflected or through which light is refracted.
(1) Note. A prism may be employed for refracting or reflecting light. Prism reflections are considered to be internal reflections; that is, the light is inside the prism body both before and immediately after the reflection.
(2) Note. A prism mount structure engaging the prism to secure it to other structure such as a barrel without obstructing the optical axis is included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
290+, for prisms with means to change the refractive index.
431, for compound lens systems with prisms for telescopes.
592+, for refracting elements employed in natural light directing systems.
606, for prismoidal anti-glare mirrors. 615, for prisms which disperse light.
618+, for plural path optical systems which divide or combine light paths.
737, for lenses with prisms.
819+, for lens mountings.
SEE OR SEARCH CLASS
356, Optics: Measuring and Testing,
51+, for optical test devices having prisms used in the infrared or ultraviolet range alone or in combination with visible light.
