The possibility of using some form of radiometer as a substitute for the eye in photometry has
been a long standing dream. The ideal instrument for this purpose may be postulated as one …

A Zeiss scanning microscope photometer with a monochro-mator was assembled and
interfaced with a Digital Equipment Corporation PDP-12 computer to form an automated …

Philip G. Stein, Lewis E. Lipkin, Howard M. Shapiro first step in this direction was the devel-
opment of a microscope stage with a" memory." This permits the biologist to control stage …

At present, infrared microspectrophotometry can be defined as the study of infrared
absorption intensities for samples smaller than the mechanical slit of the spectrometer. This …

(1) Scanning in the plane of the image with a disc or a thin steel belt perforated with holes
which are small in comparison with the structures in the image. The best-known examples …

In the two-wavelength method, photometric measurements are made at two predetermined
wavelengths of light. These are chosen so that the absorbance of homogeneously …

Since the quantum efficiency in the ultraviolet of photoemissive or photoconductive detectors
may be considerably greater than that of photographic emulsions, it has been obvious that a …

The great sensitivity of photomultipliers offers many advantages over photocell‐amplifier
systems for the measurement or comparison of low levels of illumination. However, a highly …

Kawaramachi, Kyoto 602 Absorbance cytophotometry or microspectrophotometry has been
used extensively to measure minute amounts of intracellular substances or products of …

The construction of a microspectrofluorometer with automatic correction capabilities is given.
The instrument uses a quantum counting system for correction of excitation spectra and an …