| 释义 |
photocell|ˈfəʊtəʊsɛl|
Also photo-cell, photo cell.
[f. photo- 1 + cell n.1]
A device which generates an electric current or voltage dependent on its degree of illumination.
1891Phil. Mag. XXXI. 232 The effect of this connexion with the Daniell is to develop between the poles of the photo cell a difference of potential opposed in sign to that which light produces. 1913Physical Rev. I. 74 When..the spark gap was pulled six feet away from the photo⁓cell the positive potential slowly fell to 1·6 volts. 1932Discovery Apr. 112/1 By passing the film between a light and..a photocell the film can be turned into speech again. 1938G. H. Sewell Amateur Film-Making ii. 21 The photo-cell meter is recognized as the most accurate light-measuring device normally available. 1958New Statesman 23 Aug. 214/2 There will be a system of photo-cells, which, sensitive to infra-red and visible rays, will scan the hidden side of the moon, as the rocket-probe spins on its axis. 1973Daily Tel. 10 Dec. 7/3 When fog distorts the light path, it alters the pattern being received by the photocell, which is then electronically translated into distance of visibility. |