Abstract:
The arrangement for spectral chromatic separation comprises a first prism (1) with two first surfaces (3, 5) which include a first prism angle ( alpha ) in-between them. A second prism (7) is provided with two second surfaces (9, 11) which define the second prism angle ( beta ) in-between them. One of the first (3) and one of the second (11) surfaces subtend parallel and the two angles ( alpha , beta ) are alternate angles. A layer system of thin film (21) is arranged between the subtending first and second surfaces (3, 11). The angle dependent reflexion of said layer system is matched with the angles mentioned in such a way that light of a first spectral (R) range is at least essentially reflected at an angle of incidence which is at least approximately equal to the first prism angle ( alpha ) and that light of a second and third spectral range (G, B) incidenting under said angle of incidence ( alpha ) is at least essentially transmitted. Light of the second spectral range (G) is at least essentially reflected at an angle of incidence (2 beta - alpha ) which is at least approximately equal to the difference of the doubled second prism angle and the first prism angle.
Abstract:
A multi-channel spectral imaging module for an automated testing system for cytological applications. The multi-channel spectral imaging module generates four channels of digitized images of a cytological specimen for further processing in the automated testing system. The multi-spectral imaging module comprises a visible light source and an infrared light source, an optical imaging module, a prism module, and an output stage. The cytological specimen is strobed by the visible light and infrared light sources and the illuminated images of the specimen are focused and coupled to the prism module by the optical imaging module. The prism module breaks the illuminated image into four channels comprising three visible light channels and an infrared channel. The output stage comprises a CCD array sensor for each channel. The CCD array sensor digitizes the image for channel and produces an output for further processing. The digitized output from the infrared channel provides additional information which is used by the automated testing system. The additional information derived from the infrared channel includes segmentation information, new identifying features for the specimen, and discrimination measures independent of the visible light channels. In another embodiment, a fifth channel is provided for a reference infrared output and the two infrared channels are operated in a differential mode.
Abstract:
Device for dividing a white light beam (14, 56) into a plurality of elementary beams of determined colour, said device being integrated into a chromatic analysis device for the colour printing of photographies, comprising an optical sensor (15-17) and a plurality of photosensitive sensors (24-26), each sensor allowing to collect the reflected light (28, 30, 31) by means of an optical system (21-23), to convert into an electric signal the light signal as received, and finally to amplify it (35-37); the device including also a unit (38, 39) for processing the amplified electric signals. The device is characterized in that the optical system is comprised of a plurality of dichroic filters (21-23), of complementary color, which are parallel and inclined on the optical axis (B) of the emergent beam (18), each filter reflecting the light quantity corresponding to the colour of said filter and allowing light in other colours to pass. Application to installations for printing photographic prints.
Abstract:
This invention is an optical system based on X dichroic mirrors to divide the light spectrum coming from optic input of the camera to X + I light bands. The light of each band is received from a specific image sensor. The invention is to replace the existing system based on prisms correcting defects.
Abstract:
Apparatus, systems and methods for use in analyzing discrete reactions are provided. The analytical devices of the invention use an array of nanoscale regions (a chip) that has discrete patches of nanoscale regions. The chip mates with a collection device comprising an array of compact lens trains (CLTs) where each of the CLTs corresponds to a single patch of nanoscale regions. Each CLT collects the emitted light from a patch on the chip, collimates the light, performs color separation on the collimated emitted light, and focuses the separated light onto a portion of pixels on the detector below the CLT. Such systems are useful for monitoring many analytical reactions at one time including single molecule sequencing reactions.