Lens-free holographic optical system for high sensitivity label-free microbial growth detection and quantification for screening, identification, and susceptibility testing
Disclosed are optical interrogation apparatus that can produce lens-free images using an optoelectronic sensor array to generate a holographic image of sample objects, such as microorganisms in a sample. Also disclosed are methods of detecting and/or identifying microorganisms in a biological sample, such as microorganisms present in low levels. Also disclosed are methods of using systems to detect microorganisms in a biological sample, such as microorganisms present in low levels. In addition or as an alternative, the methods of using systems may identify microorganisms present in a sample and/or determine antimicrobial susceptibility of such microorganisms.
1. An in-line holographic system comprising:
a. an illumination source;
b. a sample receptacle below the illumination source;
c. an optical sensor below the sample receptacle; and
d. a hologram controller coupled to the optical sensor.
2. The system of claim 1 , wherein the illumination source is a single illumination source.
3. The system of claim 1 , wherein the illumination source comprises more than one illumination source.
4. The system of claim 1 , wherein the illumination source is a reference beam source and the reference beam source comprises a lens-free pinhole aperture.
5. The system of claim 1 , wherein the illumination source is a reference beam source and the reference beam source comprises a plurality of spaced apart pinhole apertures and the illumination source comprises a plurality of illumination sources.
6. The system of claim 5 , wherein the plurality of illumination sources is coupled to the plurality of spaced apart pinhole apertures.
7. The system of claim 1 , wherein the illumination source is a reference beam source and the reference beam source comprises a pinhole aperture and the pinhole aperture is coupled to a wavelength filter.
8. The system of claim 1 , wherein the system produces an in-line hologram.
9. The system of claim 1 , wherein the hologram controller comprises a detector control in communication with the optical sensor or an illumination control in communication with the optical sensor.
10. The system of claim 1 , wherein the hologram controller comprises a detector control and an illumination control in communication with the optical sensor.
11. The system of claim 1 , wherein the sample receptacle receives a sample container and a portion of the sample container forms at least a part of the sample receptacle.