please help to translate

[Алвико]

Доброе утро!

Сегодня нужно сдавать переведенные стандарты, но есть некоторые недоработки. сложности с переводом некоторых фраз. а именно - other WAVELENGHT SELECTIVE DEVICES IN EITHER THE ILLUMINATING OR VIEWING BEAMS.
контекст - стандарт - Инструментальные методы измерения цвета и цветового контраста материалов.
Spectral properties of the instrument:

Identify spectral power distribution illuminating the specimen and spectral response of receiver system. The spectral characteristics of the instrument will be affected by the spectral transmirtance of filters or other WAVELENGHT SELECTIVE DEVICES IN EITHER THE ILLUMINATING OR VIEWING BEAMS. For photoluminescent specimens, the spectral distribution should he reported in terms of its conformance to a standard illuminant as outlined in CIE Publication ... and Practice E... . For non-photoluminescent specimens, the spectral distribution illuminating the specimen can be reported in terms of its conformance to a standard illuminant or its correlated color temperature.

one more phrase - HITCHING-POST STANDARDS
встречается также в стандарте, кот. называется "Измерение цвета и цветового контраста методом трехцветной колориметрии"

Color coordinates by reflected light of opaque or translucent specimens by use of either bidirectional or hemispherical geometry. The colorimeter may be standardized by use of a standard having spectral (color) and geometric characteristics similar to those of the specimens. Such standards, often called HITCHING-POST standards, are hereafter referred to as local standards.

интересует только перевод фраз WAVELENGHT SELECTIVE DEVICES IN EITHER THE ILLUMINATING OR VIEWING BEAMS и HITCHING-POST STANDARDS

спасибо!

[Enote]

приборы со (с неоднородной) спектральной зависимостью в каналах освещающего и просматривающего(?) пучков (света)