Light microscopy photometer

A PC interfaced with a microscope photometer provides a powerful analytical tool working down to cellular and subcellular levels (with polarized light). With the relatively low cost of modem PCs and the wide availability of surplus components for light microscopy, the methodology is available to anyone who can combine microscopy with computer... 

Morrow (52) has described a DTA-light photometer polarizing system for hot-stage microscopy. Thermocouple wires. 0.003 in. in diameter, were used to detect the 7 — Tr) temperature difference fo r simultaneous DT A measurements. Sample capsules were fabricated by bending small, identical stripes of AI foil over both sample and reference thermojunctions. A small hole in the foils permitted the viewing of the sample by transmitted light microscopy. The primary use of the apparatus was to study the thermal properties of thermally sensitive polymers (84). 

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