Rear screen projector with remote projection capability
First Claim
1. In a slide projection apparatus having a slide handling mechanism, the apparatus being convertible for projection of an image from a slide alternatively onto a remote surface and a built-in screen, the apparatus having projection means substantially enclosed within a housing, the projection means comprising:
- a focusable projection lens;
lens carrier means supporting said projection lens and being mounted for pivotable movement of said lens relative to said slide handling mechanism between a first orientation for projection of an image onto the remote surface, and a second orientation for projection of an image onto the built-in screen;
first lens focusing means accessible externally of said housing being coupled internally of said housing to said lens; and
second lens focusing means arranged fixedly within said housing for focusing of said lens for a predetermined image to screen distance when said lens mounting means is moved relative to said focusing means upon movement from said first lens orientation to said second lens orientation.
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Accused Products
Abstract
Disclosed is a slide projection apparatus convertible for projection of an image either onto a remote surface or onto a screen built into the housing of the apparatus. A door, for selectively blocking the projection path, is coupled with a projection lens supported on a carrier. The lens is alternatively positionable along a substantially horizontal axis for straight ahead external projection and is positionable substantially perpendicular to that axis for internal projection onto the built-in screen. During external projection, the lens is focusable. Upon return to internal projection condition, the lens is automatically focused for the built-in screen. The projection apparatus includes a device to cause the light source to be energized at a high brightness level for external projection and to be automatically changed to a lower brightness level for internal projection.
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Citations
11 Claims
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1. In a slide projection apparatus having a slide handling mechanism, the apparatus being convertible for projection of an image from a slide alternatively onto a remote surface and a built-in screen, the apparatus having projection means substantially enclosed within a housing, the projection means comprising:
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a focusable projection lens; lens carrier means supporting said projection lens and being mounted for pivotable movement of said lens relative to said slide handling mechanism between a first orientation for projection of an image onto the remote surface, and a second orientation for projection of an image onto the built-in screen; first lens focusing means accessible externally of said housing being coupled internally of said housing to said lens; and second lens focusing means arranged fixedly within said housing for focusing of said lens for a predetermined image to screen distance when said lens mounting means is moved relative to said focusing means upon movement from said first lens orientation to said second lens orientation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a slide projector apparatus convertible for projection of an image alternatively onto a remote surface and a built-in screen, the apparatus having projection means substantially enclosed within a housing into which the screen is built, the projection means comprising:
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a focusable projection lens; lens carrier means supporting said projection lens for focusing movement and being mounted for pivotable movement to orient said lens in a first orientation for projection of an image onto the remote surface, and in a second orientation for projection of an image onto the built-in screen; and the apparatus including; door means pivoted to said housing for movement selectively to open and closed conditions, and coupledwith said lens carrier means for orienting said lens to said first orientation when said door means is in said first condition and for orienting said lens to said second orientation when said door means is in said second condition. wherein an image projected through said projection lens is selectively projected onto said remote surface and onto said built-in screen. - View Dependent Claims (8, 9, 10, 11)
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Specification