首页 > Term: Cottrell meter
Cottrell meter
This instrument applies the veiling brightness method of producing threshold conditions. When in use the sighting telescope is directed toward some critical detail of the visual task and the veiling brightness is adjusted until it matches the background. The gradient filter is then turned until the target detail is at threshold visibility.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
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创建者
- ed.young
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(Milwaukee, United States)