Method and system for attenuating a wavelength shifting source
First Claim
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1. An apparatus comprising:
- a light source which produces a first radiation within a first wavelength range and which produces a second radiation within a second wavelength range when a property of the light source is changed andan optical device which receives the first radiation and attenuates the first radiation to emit a first attenuated radiation having a first perceived brightness and which receives the second radiation and attenuates the second radiation to emit a second attenuated radiation having a second perceived brightness, wherein the first and second perceived brightnesses are approximately equal.
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Abstract
An apparatus comprises a light source which produces a first radiation within a first wavelength range and which produces a second radiation within a second wavelength range when a property of the light source is changed. The apparatus further comprises an optical device which receives the first radiation and attenuates the first radiation to emit a first attenuated radiation having a first perceived brightness. The optical device also receives the second radiation and attenuates the second radiation to emit a second attenuated radiation having a second perceived brightness. The first and second perceived brightnesses are approximately equal.
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Citations
24 Claims
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1. An apparatus comprising:
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a light source which produces a first radiation within a first wavelength range and which produces a second radiation within a second wavelength range when a property of the light source is changed and an optical device which receives the first radiation and attenuates the first radiation to emit a first attenuated radiation having a first perceived brightness and which receives the second radiation and attenuates the second radiation to emit a second attenuated radiation having a second perceived brightness, wherein the first and second perceived brightnesses are approximately equal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A sighting apparatus comprising:
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an elongated housing including a first end and a second end defining an optical axis, wherein the second end is configured to admit external light from an external scene; a light source within the housing which produces a first light within a first wavelength spectrum and which produces a second light within a second wavelength spectrum when a property of the light source is changed; an optical device which combines the external light with the first light to create a first combined light and attenuates the first combined light to emit a first attenuated light having a first perceived brightness and combines the external light with the second light to create a second combined light and attenuates the second combined light to emit a second attenuated light having a second perceived brightness, wherein the first and second perceived brightnesses are approximately equal. - View Dependent Claims (17, 18, 19, 20)
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21. A method comprising:
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projecting from a light source a first radiation within a first wavelength range; responsive to a change in a property of the light source, projecting from the light source a second radiation within a second wavelength range; receiving at an optical device the first and second radiations; conveying from the optical device an attenuated form of the first radiation having a first perceived brightness; and conveying from the optical device an attenuated form of the second radiation having a second perceived brightness, wherein the first and second perceived brightnesses vary by less than 10%. - View Dependent Claims (22, 23, 24)
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Specification