초록 ▼

This invention is for a broad spectrum apparatus that provides a substantially uniform spectral response from a spectrometer by introducing one or more elements whose combined response or correction factor is the inverse of that produced by the rest of the apparatus. The response of the elements can

This invention is for a broad spectrum apparatus that provides a substantially uniform spectral response from a spectrometer by introducing one or more elements whose combined response or correction factor is the inverse of that produced by the rest of the apparatus. The response of the elements can be formed either pre or post dispersion. In the case of pre-dispersion the correcting components may be optical components chosen from a full combination of optical filters, either purely transmissive or a combination of transmissive and reflective as in the case of dichroic mirrors, optical lenses with chromatic aberration, integrating spheres or other diffusers coated with material whose response is wavelength dependant. The post-dispersive application may involve a spatial filter or shaped aperture to partially block the more intense wavelengths. A particular attractive application may be a mask that is directly etched onto the surface of a CCD array detector. Post-dispersive applications may also include custom neutral density filters or variable neutral density filters.

대표청구항 ▼

[ We claim:] [1.] An apparatus for analysing the intensity of electromagnetic radiation from a sample comprising;a dispersing spectrometer in combination with a light source;said light source being adapted to illuminate the sample whose spectral properties are to be measured, the light from said sam

[ We claim:] [1.] An apparatus for analysing the intensity of electromagnetic radiation from a sample comprising;a dispersing spectrometer in combination with a light source;said light source being adapted to illuminate the sample whose spectral properties are to be measured, the light from said sample being adapted to be directed into the dispersing spectrometer including a detector array comprising a number of detectors adapted to measure the intensity of the dispersed light; andwherein the apparatus further comprises an element adapted to cause the dispersed light reaching the detectors in the detector array to be modified in intensity non-uniformly across the spectrum to give a response over all the detectors of the detector array within their dynamic range.