Abstract:
The present disclosure relates to the field of optical systems. The envisaged multi-scan optical system is compact and stable. The system comprises an excitation source, a hydra fiber cable, a wavelength selector, an optical element, and a detector. The excitation source is configured to emit composite light. The hydra fiber cable has a head and a plurality of tentacles, and is configured to receive the composite light via a second lens. The plurality of tentacles is configured to emit the composite light towards the wavelength selector which includes a plurality of optical slits (s1-s8) and a plurality of shutters. The wavelength selector is configured to selectively collect and filter the composite light directed by a first lens and the plurality of tentacles by means of the plurality of shutters. The detector is configured to detect the plurality of spectral line scans reflected by the optical element for spectrometric analysis.
Abstract:
A scanning confocal microscopy system and apparatus, especially useful for endoscopy with a flexible probe which is connected to the end of an optical fiber (9). The probe has a grating (12) and a lens (14) which delivers a beam of multi-spectral light having spectral components which extend in one dimension across a region of an object and which is moved to scan in another dimension. The reflected confocal spectrum is measured to provide an image of the region.
Abstract:
To achieve a given spectral resolution with reduced detector size and commercially available pixel pitches, the Raman spectrum is shifted across the detector array such as by one of the following methods: 1) tuning the excitation wavelength; 2) rotating the grating; 3) displacing the effective input slit (fiber) and acquiring the spectrum under stepped displacement conditions; and 4) displacement of a lens relative to input fiber to displace effective input slit relative to the detector. A composite spectrum is formed and deconvolution of the entrance aperture image and/or pixel masking is then used.
Abstract:
A spectrophotometer employs an array of optical elements to focus light from at least one, but preferably two light sources onto a fiber optic beam splitter that provides a pickup for a selected bandwidth of wavelengths of light in the spectral pattern. The spectral pattern can include wavelengths in the visible, near infrared and ultraviolet spectrum. To create the spectral pattern, two reflecting prisms having spherical surfaces are used, and the optical elements are arranged so that the two spectral bands from each prism are longitudinally aligned to create the spectral pattern. The prisms are on a motor driven pivot mount so that the spectral pattern may be swept across the pickup. The optical elements and the pickup are sized so that the selected bandwidth is less than twenty nanometers over the spectral pattern. The pickup is formed by a single row of the ends of fiber optic strands which are then collimated into two bundles to transmit a test component and a reference component of light. The sample cell is somewhat elongated, and a lens is interposed in the test component path before the sample cell, and this lens is sized to focus light axially through the sample cell without impinging on the sidewalls. Photodiode detectors, comparator circuitry and a controller are included.
Abstract:
The present invention relates to a method and system for fibre positioning in wide-field astronomy. In one form the method and system of the present invention relate to anchoring fibre end points adjacent or against the field plate of a telescope. In one embodiment the positioning system for anchoring a fibre end point at a location on a telescope field plate collocated with a telescope focal plane, the positioning system comprising a piezoelectric positioning device for positioning the fibre end point, the positioning device comprising a chamber having an opening, the opening lying against the field plate in use defining a substantially enclosed volume inside the chamber, a pump for reducing pressure inside the enclosed volume; and a path connecting the pump and the enclosed volume so that, in use, the pump effects a reduction in pressure in the chamber thereby anchoring the fibre end point on the field plate.
Abstract:
The invention aims to simplify the design of the known conoscopic measurement devices (10) used for determining the viewing angle-dependent contrast in particular of transmission-operated liquid crystal displays, and to calibrate such a measurement device spectrographically and make it more versatile. This is done according to the invention by dispensing with the conventional projection optics (for forming an image of the interference pattern on a detector array) and making use instead of relatively few individual rapid detectors (18) for spectrally integrating and/or spectrally analysing light measurement. These detectors are connected, directly or as directly as possible via optical waveguide devices (20) in the interference plane to point surface elements in the interference pattern selected according to the angle of view. When optical waveguides (20, 20') which branch off to different detectors are connected, completely different direction-dependent measurements can be made and recorded at precisely the same time and for identical angles of view, as can (in addition to the contrast measurements) saturation measurements and measurements of dynamic switching characteristics.
Abstract:
Improved methods, systems and apparatus relating to wide field fluorescence and reflectance imaging are provided, including improved methods, systems and apparatus relating to removal of background signals such as autofluorescence and/or fluorophore emission cross-talk; distance compensation of fluorescent signals; and co-registration of multiple signals emitted from three dimensional tissues.
Abstract:
The present invention relates to a method and system for fibre positioning in wide-field astronomy. In one form the method and system of the present invention relate to anchoring fibre end points adjacent or against the field plate of a telescope. In one embodiment the positioning system for anchoring a fibre end point at a location on a telescope field plate collocated with a telescope focal plane, the positioning system comprising a piezoelectric positioning device for positioning the fibre end point, the positioning device comprising a chamber having an opening, the opening lying against the field plate in use defining a substantially enclosed volume inside the chamber, a pump for reducing pressure inside the enclosed volume; and a path connecting the pump and the enclosed volume so that, in use, the pump effects a reduction in pressure in the chamber thereby anchoring the fibre end point on the field plate.
Abstract:
A scanning-type lithographic and image-pickup device causes the terminal face of either a projecting optical fiber or a picking-up optical fiber to scan a given object in the plane of real image of an objective lens, projects a light through the projecting optical fiber onto the object, and receives the reflected light or a light of photoluminescence through the picking-up optical fiber. When this device is applied to a spectromicroscope, the quantitative surface information can be spectrally measured with high resolution and high reproducibility. When the device is applied to a contracting-projection exposure device or a selective laser annealing device, positional alignment and exposure pattern correction can be easily effected with high accuracy and high productivity. Simultaneous fabrication of a plurality of electronic components can be also obtained by use of this device.