摘要:
An imaging device uses a fiber optic faceplate (FOF) with a compressive sampling algorithm for the fluorescent imaging of a sample over an large field-of-view without the need for any lenses or mechanical scanning. The imaging device includes a sample holder configured to hold a sample and a prism or hemispherical glass surface disposed adjacent the sample holder on a side opposite the lower surface of the sample holder. A light source is configured to illuminate the sample via the prism or the hemispherical surface, wherein substantially all of the light is subject to total internal reflection at the lower surface of the sample holder. The FOF is disposed adjacent to the lower surface of the sample holder, the fiber optic array having an input side and an output side. The device includes an imaging sensor array disposed adjacent to the output side of the fiber optic array.
摘要:
An imaging device uses a fiber optic faceplate (FOF) with a compressive sampling algorithm for the fluorescent imaging of a sample over an large field-of-view without the need for any lenses or mechanical scanning. The imaging device includes a sample holder configured to hold a sample and a prism or hemispherical glass surface disposed adjacent the sample holder on a side opposite the lower surface of the sample holder. A light source is configured to illuminate the sample via the prism or the hemispherical surface, wherein substantially all of the light is subject to total internal reflection at the lower surface of the sample holder. The FOF is disposed adjacent to the lower surface of the sample holder, the fiber optic array having an input side and an output side. The device includes an imaging sensor array disposed adjacent to the output side of the fiber optic array.
摘要:
A compact and light-weight lens-free platform to conduct automated semen analysis is disclosed. The device employs holographic on-chip imaging and does not require any lenses, lasers or other bulky optical components to achieve phase and amplitude imaging of sperm a relatively large field-of-view with an effective numerical aperture of approximately 0.2. A series of digital image frames is obtained of the sample. Digital subtraction of the consecutive lens-free frames, followed by processing of the reconstructed phase images, enables automated quantification of the count, the speed and the dynamic trajectories of motile sperm, while summation of the same frames permits counting of immotile sperm.
摘要:
A compact and light-weight lens-free platform to conduct automated semen analysis is disclosed. The device employs holographic on-chip imaging and does not require any lenses, lasers or other bulky optical components to achieve phase and amplitude imaging of sperm a relatively large field-of-view with an effective numerical aperture of approximately 0.2. A series of digital image frames is obtained of the sample. Digital subtraction of the consecutive lens-free frames, followed by processing of the reconstructed phase images, enables automated quantification of the count, the speed and the dynamic trajectories of motile sperm, while summation of the same frames permits counting of immotile sperm.
摘要:
An optical device and methods of using an optical device are provided. The optical device includes a hollow-core fiber including a first portion and a second portion. The first portion includes a hollow core having a first diameter. The second portion includes a hollow core having a second diameter smaller than the first diameter. The difference between the first diameter and the second diameter is less than 10% of the first diameter.
摘要:
An apparatus characterizes at least one fiber Bragg grating. The apparatus includes a laser pulse source, an optical spectrum analyzer, and multiple optical paths. A first optical path includes a pulse stretcher and an attenuator. A second optical path optically coupled to the first optical path includes a mirror. A third optical path optically coupled to the first optical path includes a first fiber Bragg grating. A fourth optical path is optically coupled to the second optical path, the third optical path, and the optical spectrum analyzer. A fifth optical path optically coupled to the laser pulse source and the optical spectrum analyzer includes a delay line.
摘要:
An apparatus is provided for measuring a frequency-domain optical coherence tomography power spectrum from a sample. The apparatus includes a broadband light source, an optical spectrum analyzer, and a partially reflective element optically coupled to the light source, to the optical spectrum analyzer, and to the sample. A first portion of light from the light source is reflected by the partially reflective element and propagates to the optical spectrum analyzer. A second portion of light from the light source propagating through the partially reflective element, impinging the sample, reflecting from the sample, and propagating to the optical spectrum analyzer.
摘要:
An apparatus characterizes at least one fiber Bragg grating. The apparatus includes a laser pulse source, an optical spectrum analyzer, and multiple optical paths. A first optical path includes a pulse stretcher and an attenuator. A second optical path optically coupled to the first optical path includes a mirror. A third optical path optically coupled to the first optical path includes a first fiber Bragg grating. A fourth optical path is optically coupled to the second optical path, the third optical path, and the optical spectrum analyzer. A fifth optical path optically coupled to the laser pulse source and the optical spectrum analyzer includes a delay line.
摘要:
A method determines the complex scattering function of a portion of a sample under analysis. The method includes providing a magnitude spectrum of a complex spatial Fourier transform of a complex intermediate function. The complex intermediate function is dependent on the complex scattering function of the sample. The magnitude spectrum is obtained from power spectrum data of frequency-domain optical coherence tomography of the sample. The method further includes providing an estimated phase term of the complex spatial Fourier transform. The method further includes multiplying the magnitude spectrum and the estimated phase term together to generate an estimated complex spatial Fourier transform. The method further includes calculating an inverse Fourier transform of the estimated complex spatial Fourier transform. The method further includes calculating an estimated intermediate function by applying at least one constraint to the inverse Fourier transform of the estimated complex spatial Fourier transform.
摘要:
An apparatus characterizes at least one fiber Bragg grating. The apparatus includes a laser pulse source, an optical spectrum analyzer, and multiple optical paths. A first optical path includes a pulse stretcher and an attenuator. A second optical path optically coupled to the first optical path includes a mirror. A third optical path optically coupled to the first optical path includes a first fiber Bragg grating. A fourth optical path is optically coupled to the second optical path, the third optical path, and the optical spectrum analyzer. A fifth optical path optically coupled to the laser pulse source and the optical spectrum analyzer includes a delay line.