초록 ▼

An improved spectrophotometer, especially suitable for use in centrifugal analysis instrumentation, is disclosed. The spectrophotometer is improved by including therein a detector comprising a photodiode array assembly having a photodiode array, a spectral filter assembly situated substantially para

An improved spectrophotometer, especially suitable for use in centrifugal analysis instrumentation, is disclosed. The spectrophotometer is improved by including therein a detector comprising a photodiode array assembly having a photodiode array, a spectral filter assembly situated substantially parallel thereto and in the path of incident light and means for attenuating stray light which would otherwise impinge on each of the photodiodes of the array.

대표청구항 ▼

In a spectrophotometer comprising: (a) a flash lamp; (b) a grating for receiving a beam of light delivered by the flash lamp which has passed through a sample for analysis; and (c) a detector situated to receive the beam of light reflected by said grating; the improvement wherein the detector compri

In a spectrophotometer comprising: (a) a flash lamp; (b) a grating for receiving a beam of light delivered by the flash lamp which has passed through a sample for analysis; and (c) a detector situated to receive the beam of light reflected by said grating; the improvement wherein the detector comprises: a photodiode array assembly including: a plurality of individual photodiodes situated in a first plane wherein a substantial portion of said photodiodes are separated one from the other by an externally electrically grounded photodiode to reduce electrical crosstalk; a plurality of individual adjacent spectral filters situated substantially parallel to said first plane and contacting said plurality of photodiodes wherein an optically opaque material surrounds each of said spectral filters, whereby components of light are allowed to pass through one of said spectral filters to one of said individual photodiodes but said components of light are blocked, after entering said one of said filters, from passing through any other one of said filters such that light passing through each of said individual adjacent spectral filters will impinge upon only one of said individual photodiodes; and a means for attentuating stray light, said means being situated substantially parallel to said first plane and adjacent to said plurality of individual spectral filters such that said means is located above each of said individual photodiodes.