| 摘要 |
A system for testing electrical lamps includes a hollow cylinder. Lamps are placed in the hollow cylinder and the light emitted from the lamp is focused onto a phototransistor by a focusing lens. The output of the phototransistor is measured against the electrical voltage input into the lamp. If the output of the phototransistor lags behind the input voltage to the lamp by more than a predetermined amount, the lamp is rejected.
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