Patent ID: 11880171
Assignee: COLDQUANTA, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A fluorescence detection system comprising:
an hermetically sealed cell containing molecular entities;
a trap generator for generating an optical trap to confine the molecular entities to a subregion of the hermetically sealed cell;
a probe source for generating a probe beam causing the molecular entities to transition to a first excited state from which at least some of the molecular entities can emit fluorescence as they spontaneously return to a ground state, the probe beam having a first probe wavelength, the fluorescence including photons of a first fluorescence wavelength;
a spectral filter for spectrally filtering the fluorescence, the spectral filter being characterized by an effective angle of incidence on the spectral filter within which the spectral filter can effectively block the first probe wavelength and transmit the first fluorescence wavelength, the spectral filter being less effective at blocking the first probe wavelength or transmitting the first fluorescence wavelength at larger angles of incidence, at least half of trapped molecular entities being within a conical volume defined by the effective angle of incidence; and
a fluorescence detector for detecting spectrally filtered fluorescence transmitted by the spectral filter.