| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration of accuracy of a leakage confirmation work, regardless of a gas leakage state and a photographing condition.SOLUTION: Plural LED units 54 are arranged around photographing optical axis P of a gas leakage photographing device, and each LED unit 54 is attached to one of plural turning members 70 which are turned respectively by driving force of a motor. When an operator instructs condensation of light emitted from the LED units 54, the turning members 70 are turned in a direction where the emitted light is condensed by the driving force of the motor, then the emitted light is condensed in a relatively short range (refer to (A)). When the operator instructs diffusion of the emitted light emitted from the LED units 54, the turning members 70 are turned in a direction where the emitted light is diffused by the driving force of the motor, then the emitted light is diffused and a radiation range of the emitted light is expanded (refer to (B)).SELECTED DRAWING: Figure 8 |
