isochromatic adjective & noun. [,ʌɪsǝ(ʊ)krǝ(ʊ)'matɪk] E19.
[from ISO- + CHROMATIC adjective.]
A. adjective.
1. Optics. Of a single colour or tint; spec. designating a fringe in an interference pattern obtained with birefringent material (as a biaxial crystal) which in photoelastic testing indicates points where the difference between the principal stresses is the same. Also, representing or depicting such fringes. E19.

2. Photography. = ORTHOCHROMATIC. obsolete exc. Hist. L19.
b. noun. An isochromatic fringe or line. E20.

[TahlilGaran] English Dictionary ▲