TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Concentrators have been developed for space applications. One such example... uses a Cassegrain mirror concentrator. A solar cell is exposed to concentrated sunlight in the Cassegrain mirror concentrator in which the light is focused by a secondary mirror on the solar cell attached to the front of a primary mirror. The back of the primary mirror is made black, and thus serves as a radiator, dissipating the heat from the solar cell.  1, record 1, English, - Cassegrain%20mirror%20concentrator

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A reading of a small section of the screen in a camera by a cell probe, a deflector in the mirror or any one of a number of devices.  1, record 2, English, - spot%20method

Record number: 2, Textual support number: 1 OBS

The metering device must be aimed at the medium-gray tone in the subject for a direct reading; separate highlight and shadow readings can also be taken and the mid-point used for exposure.  1, record 2, English, - spot%20method

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

[Méthode de lecture par posemètre qui] n'utilise qu'une seule cellule placée derrière le miroir d'où elle ne [lit] qu'une très faible portion de l'image.  1, record 2, French, - m%C3%A9thode%20s%C3%A9lective

Record number: 2, Textual support number: 1 OBS

Cette plage de lecture, dirigée sur une zone de valeur lumineuse intermédiaire du sujet donne une mesure directe. On peut aussi mesurer successivement les hautes lumières, puis les ombres pour prendre une valeur d'exposition moyenne.  1, record 2, French, - m%C3%A9thode%20s%C3%A9lective

Record 2,  Textual support,  Spanish