[Development of a calibrating control unit for a grating monochromator and its clinical application].

For precise measurements of minimal erythema dose (MED) in photosensitive dermatoses, a calibrating control unit was developed for a grating monochromator. Seasonal and sexual differences of wavelength-specific MED and the effects of different half-value wave-width for each wavelength were determined in 64 healthy adults. Wavelength-specific MED was studied using the apparatus in 19 patients with photosensitive dermatoses, including 2 patients with xeroderma pigmentosum, 2 patients with polymorphous light eruption, one patients with actin reticuloid, 2 patients with drug-induced photosensitive dermatitis and 2 patients with hydroa vacciniforme.