Scintillation Counter (667 bytes)
1: ...er tube measures the light from the crystal. The photocell is usually attached to an [[electronic amplifier]...

Infinite Corridor (1540 bytes)
5: ...e round-trip time was about two microseconds. The photocell picked up both the direct and reflected flashes. ...

Solar mirror (3040 bytes)
7: ...ighter and cheaper than equivalent large areas of photocells.

Air shower (1606 bytes)
1: ...This can be detected with arrays of mirrors and [[photocell]]s. The actual arrival of the cascade of particle...

Yenisey-2 (1521 bytes)
1: ...ng was achieved by rotating the craft itself. A [[photocell]] was used to detect the [[Moon]] and orient the ...

Sensor (5900 bytes)
8: *[[light]] sensors: [[photocell]]s, [[photodiode]]s, [[phototransistor]]s, [[Phot...
24: ... detects a specific proximity. A combination of a photocell and LED or laser. Applications in cell phones, pa...
27: ...ser light is scaned over the scene by a mirror. A photocell sensor located at an offset responds when the bea...

Atomic clock (8336 bytes)
21: ... resonance frequency, [[electronics]] between the photocell and radio transmitter adjusts the frequency of th...
23: ...enerate a modulated signal at the photocell. The photocell's signal can then be demodulated to apply feedbac...

Paul Gottlieb Nipkow (2594 bytes)
7: ...rom different portions of it passed to a selenium photocell. The number of scanned lines was equal to the num...

Sulfide (2995 bytes)
6: ...um]] disulfide (CdS₂) can be used in [[photocell]]s.

Pioneer 4 (3084 bytes)
7: ...r of the ring. The sensor was designed with two [[photocell]]s which would be triggered by the light of the M...

Transducer (3676 bytes)
43: **[[photocell]] or [[light-dependent resistor]] (LDR) - convert...

Luna 3 (7949 bytes)
66: ...ontinued on to the far side. On [[October 7]] the photocell on the upper end of the spacecraft detected the s...
71: ...ting was achieved by rotating the craft itself. A photocell was used to detect the Moon and orient the upper ...

Wilkinsburg, Pennsylvania (3764 bytes)
3: ...n]] designed and patented the [[iconoscope]], the photocell "eye" of early television cameras.

Contact electrification (4967 bytes)
1: ...io receiver|radio detector diodes]], [[solar cell|photocell]]s, [[light emitting diodes|LED]]s, and [[thermoe...

Attitude control (4484 bytes)
8: ...ounted at a fixed angle to a rotating bearing. A photocell or solid-state camera arrangement sees the star. ...

Point of sale (4649 bytes)
9: ...t]] or sometimes a rotating [[carousel]], and a [[photocell]] to stop it when items reach the end. The [[cas...

Optical phenomenon (5194 bytes)
80: ...urrent in a material or through a vacuum (as in a photocell) when the material is exposed to light, led to ad...

Nipkow disk (5869 bytes)
29: ... electric signals) can be as simple as a single [[photocell]] or [[photodiode]], since each instant only a ve...

Enzian missile (5886 bytes)
17: ...remains famous. The Madrid used an [[infrared]] [[photocell]] mounted on the front of a steerable telescope m...

Rubidium (10470 bytes)
160: *As a [[photocell]] component.

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