Optical reader system for substrates having an optically readable code
First Claim
1. An optical reader system comprising:
- a source light assembly including a code-reading beam and a fluorescence-excitation beam that are configured to illuminate encoded substrates, the substrates having optically readable codes that provide output signals when the code-reading beam is incident thereon, the output signals being indicative of the codes;
a fluorescence detector configured to detect fluorescent signals from the substrates;
code pickup optics configured to project the output signals from the optically readable codes onto a Fourier plane; and
a code detector positioned to detect the output signals in the Fourier plane.
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Abstract
An optical reader system including a source light assembly that has a code-reading beam and a fluorescence-excitation beam that are configured to illuminate encoded substrates. The substrates have optically readable codes that provide output signals when the code-reading beam is incident thereon. The output signals are indicative of the codes. The reader system also includes a fluorescence detector that is configured to detect fluorescent signals from the substrates and code pickup optics that are configured to project the output signals from the optically readable codes onto a Fourier plane. The reader system also includes a code detector that is positioned to detect the output signals in the Fourier plane.
459 Citations
20 Claims
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1. An optical reader system comprising:
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a source light assembly including a code-reading beam and a fluorescence-excitation beam that are configured to illuminate encoded substrates, the substrates having optically readable codes that provide output signals when the code-reading beam is incident thereon, the output signals being indicative of the codes; a fluorescence detector configured to detect fluorescent signals from the substrates; code pickup optics configured to project the output signals from the optically readable codes onto a Fourier plane; and a code detector positioned to detect the output signals in the Fourier plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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illuminating encoded substrates with a code-reading beam and a fluorescence-excitation beam, the substrates having optically readable codes that provide output signals when the code-reading beam is incident thereon, the output signals being indicative of the codes, and the substrates further having fluorescent molecules that provide fluorescent signals when the fluorescence-excitation beam is incident thereon; projecting the output signals onto a Fourier plane; detecting the output signals in the Fourier plane; and detecting the fluorescent signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification