US 5,208,891 A · Fiber-optic viewgraph projector

Abstract

A viewgraph projector having a light above the transparency receiver and jecting downward through the transparency is provided. The projected image is received below the transparency by a condenser lens and further transmitted by a flexible fiber-optic cable. A projecting lens is provided at the output end of the fiber-optic cable for projecting the images to a screen. Structurally associated with the projecting lens is a device or means which enables removably affixing the projecting lens relative to a suitable support in a conference room environment, which device may for example constitute a clip, hooking means, clamp, or weights. This enables a subset of the aforesaid elements comprising the light source, transparency receiver, and condenser lens to be located independently of the projecting lens, as for example, to locations where they do not obstruct the audience's field of view or where backscattered illumination from the light source does not annoy the audience. A three-sided wall extends downward from the level of the light to the transparency receiver reducing external illumination and providing intrinsic convective cooling of the light.

Claims5

Dependent claims

A fiber-optic viewgraph projector comprising:

means for mounting projector components including a vertical stand suitable for locating components in a stacked configuration;
a light source attached to said mounting means, the construction and arrangement being such that intrinsic convective cooling of the light source is provided;
a transparency receiver and condenser lens assembly attached to said mounting means and receiving projection light from said light source;
a fiber-optic cable attached on a first end to said transparency receiver and lens assembly;
and
a projecting lens attached to a second end of said fiberoptic cable, and having a means by which it may be removably affixed in position relative to suitable structures in a conference room environment.

3 more elements

Dependencies are inferred from the claim text.

Fiber-optic viewgraph projector

Life of this patent

Fiber-optic viewgraph projector

Life of this patent

Abstract

Claims5