Restricted access display system
First Claim
1. A method for restricting access to information that is written in a color having predetermined wavelengths on a clear material that comprising the steps of:
- (a) applying polarized light having the predetermined wavelengths in a specified plane to a back of a clear material;
(b) illuminating a front of the clear material with light;
having the predetermined wavelengths;
(c) adjusting the light illuminating the back of the clear material and the light illuminating the front of the clear material so that the information written on the material will have the same illumination and will be invisible to a observer; and
(d) polarizing the white light emanating from the material so that a designated observer will be able to view the information written on the material.
2 Assignments
0 Petitions
Accused Products
Abstract
A board that hides information in a manner that only certain authorized personnel may change the information and other authorized personnel may view the information. This invention accomplishes the foregoing by placing a locked panel of translucent material over certain information written on the board that may only be changed by an authorized individual by opening the lock. A panel of opaque material is placed over the translucent material in a manner that certain information written on the board will be revealed when authorized personnel remove the opaque material or cause the opaque material to be transparent. The translucent material may be removed by activating a switch or entering a code.
22 Citations
16 Claims
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1. A method for restricting access to information that is written in a color having predetermined wavelengths on a clear material that comprising the steps of:
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(a) applying polarized light having the predetermined wavelengths in a specified plane to a back of a clear material;
(b) illuminating a front of the clear material with light;
having the predetermined wavelengths;
(c) adjusting the light illuminating the back of the clear material and the light illuminating the front of the clear material so that the information written on the material will have the same illumination and will be invisible to a observer; and
(d) polarizing the white light emanating from the material so that a designated observer will be able to view the information written on the material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 15)
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10. A method for restricting access to material that is written on a board, the method comprising the steps of:
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(a) placing a locked translucent panel over the board in a manner that information may be written on the board when the locked panel is open by personnel that are authorized to change the information written on the board;
(b) placing an opaque panel over some or all of the information written on the board; and
(c) unlocking the opaque panel by personnel that are allowed to view the information written on the board and not allowed to change information written on the board so that the information under the opaque panel may be viewed. - View Dependent Claims (11, 12, 13, 14, 16)
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Specification