Horiba Jobin-yvon, Inc.

Other

Instruments S.a.

Jobin Yvon, Inc.

Warren Stephen Slutter

Wu Jiang

Alain F Thevenon

Viviane D Millet

Jeremy J Goldstone

Kevin Lange

Neil Stein

Alain F R Thevenon

Jian Ming Xiao

A modified concentric spectrograph for diffracting light with high stray light rejection without astigmatism is provided. The modified spectrograph includes a grating, a lens, and at least one entrance port and one exit port. The grating has a concave surface and a meridian plane with a first side and a second side. The lens has a substantially planar surface and a convex surface. Preferably, the convex and concave surfaces are substantially concentric. The ports are substantially located on different sides of the meridian plane near a focal plane of the spectrograph. The position of a focal plane may be modified using an optically transmissive triangular prism with a reflective surface, and an optically transmissive block. The position of a focal plane may further be modified with one or more optically transmissive plates. Methods for using the spectrograph are also provided.

Modified concentric spectrograph

A mobile radio receiver system for a vehicle providing recent segment replay function is disclosed. The wireless receiver is adapted to be contained within the vehicle. A digital delay line is coupled to receive the output of the wireless receiver. A delay selection switch is coupled to the digital delay line to route the output of the wireless receiver with a selected temporal delay in response to actuation by a person riding in the vehicle. In accordance with the preferred embodiment, the recent transmitted segment ends at the time that the delay selection switch is actuated. A control device is associated with the wireless receiver for receiving control selections from the person riding in the vehicle. An amplifier is coupled to receive the routed output of the wireless receiver. An audio transducer this adapted to receive the output of the amplifier and provide an audible signal to the person riding in the vehicle.

Onboard electronic system with user controlled temporal characteristics

A spectrograph with a first concave spectrographic diffraction grating is positioned to receive light from an input light source. The first concave spectrographic diffraction grating is configured to provide a diffracted light output dispersing the components of the input light source in a first dispersion direction with a first angular orientation with respect to the plane of the grating. The dispersion forms the input light into an intermediate spectrum. The intermediate spectrum is formed in a focal surface by the once diffracted light. A slit is substantially positioned on the focal surface. A second concave diffraction grating is positioned to receive once diffracted light from the slit and configured to provide a twice diffracted light output, the second concave diffraction grating dispersing the components of the input light source in a second diffraction direction with a second angular orientation with respect to the plane of the grating. The second dispersion angular orientation is different from the first dispersion angular orientation. The second dispersion forms the input light into an output spectrum.

Double grating three dimensional spectrograph with multi-directional diffraction

A Littrow-type spectrometer or monochromator using a folded light path to provide a compact optical instrument is disclosed. Light enters the instrument through an inlet aperture on a planar mirror. The aperture is located at the focus of a parabolic collimator mirror. Collimated light reflected by the parabolic mirror is reflected back to the planar mirror, which is positioned at an angle to the collimated light. The light reflected from the planar mirror is directed at a planar grating that produces diffracted light having all the wavelengths input into the system, including light of a selected wavelength, back towards the planar mirror. Light having the selected wavelength is thus caused to fall on the parabolic mirror. The parabolic mirror then focuses the selected wavelength of light onto a light exit aperture that is juxtaposed to the inlet light aperture. The planar grating can be rotatably mounted to scan the input light spectrum.

Compact littrow-type scanning spectrometer

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Lebanon, NJ, United States of America

Warren Stephen Slutter