SPIE

NRC publication: Ye

3D Imager Using Dual Color-Balanced Lights

NRC publication: Ye

WAVELENGTH PROBING OPTICAL COHERENCE TOMOGRAPHY

In swept-source optical coherence tomography (SSOCT), the swept-source stimulates system by a series of wavelengths in time sequence; a photo detector then collects all re\ub0ected/backscattered light from testing sample as the components of Fourier series. Due to the nature of the SSOCT, the processing in spectral domain can merge multiple swept-sources with di\uaeerent central wavelengths, which greatly increases the resolution of the OCT imaging. In the wavelength probing OCT, a standard broadband SSOCT system is used to extract the internal structure of the sample, and another narrow band light can be used to probe the spectral feature of the sample at the probing wavelength.Peer reviewed: YesNRC publication: Ye

Optical system having a large focal depth for distant object tracking.

We analyze an optical system after inserting a simple quartic phase plate in its pupil plane to extend the focal depth. The system is used specifically to track distant objects like stars. We design an optimum quartic phase plate for a real lens system which has an effective focal length of 29 mm, an F-number of 1.6, a field of view of 20 degrees, and a working wavelength range of 0.5~0.75 ?m. By introducing the quartic phase plate, we enhance the focal depth of the system more than threefold as compared to a system having no phase plate

A Hybrid Optical Correlator Used as an Intelligent Instrument

NRC publication: Ye

Engineering implementation of a hybrid optical correlator using SLMs

NRC publication: Ye