WAVELENGTH DEPENDENT OPTICAL ELEMENTS AND APPLICATIONS THEREOF
First Claim
Patent Images
1. An optical element comprising:
- a first wavelength-dependent reflective layer comprising a first surface relief structure having a first optical output image; and
a second wavelength-dependent reflective layer comprising a second surface relief structure having a second optical output image.
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Abstract
The present invention provides an optical element operable to display a plurality of distinct images when irradiated with various wavelengths of electromagnetic radiation. The ability to output a plurality of distinct images can permit the use of optical elements of the present invention in a variety of apparatus and imaging applications.
12 Citations
26 Claims
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1. An optical element comprising:
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a first wavelength-dependent reflective layer comprising a first surface relief structure having a first optical output image; and a second wavelength-dependent reflective layer comprising a second surface relief structure having a second optical output image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of displaying at least one optical pattern comprising:
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providing an optical element comprising; a first wavelength-dependent reflective layer comprising a first surface relief structure having a first optical output pattern and a second wavelength-dependent reflective layer comprising a second surface relief structure having a second optical output pattern; and irradiating the optical element with electromagnetic radiation having a wavelength reflected by the first wavelength-dependent reflective layer or the second wavelength-dependent layer to display the first optical output pattern or the second optical output pattern. - View Dependent Claims (21, 22, 23, 24)
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25. A method of displaying an optical pattern comprising:
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providing an optical element comprising; a first wavelength-dependent reflective layer comprising a first surface relief structure having a first optical output pattern and a second wavelength-dependent reflective layer comprising a second surface relief structure having a second optical output pattern; irradiating the optical element with electromagnetic radiation having a wavelength reflected by the first wavelength-dependent reflective layer to display the first optical output pattern; and adjusting the electromagnetic radiation to have a wavelength reflected by the second wavelength-dependent reflective layer to display the second optical output pattern. - View Dependent Claims (26)
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Specification