| 摘要 |
PURPOSE:To combine the display section and light measuring section and display measured values and others in the same area of view by receiving the light that passes through a display plate or reflects from it and applying calculation to the obtained light measurement data and displaying this on the said display plate. CONSTITUTION:A display plate 1 consists of liquid crystal matrix cells, etc. and it is placed in front of a light amount sensor 2. The output of the sensor 2 is amplified by an amplifier 3 and supplied to an arithmetic unit (CPU)4, and there analog signals are converted into digital signals, and the latter are stored as the light measurement data in a memory 5. A display control circuit 6 determines the light transmission section of the display plate 1 and makes the results of calculation displayed on the display plate 1. A light in the direction of A passes through the point B of the opening in the display plate 1 at a certain time and measured by the sensor 2, and the measurement is stored as a light measurement data at the point B. The measured light is scanned successively in the direction of the arrow mark E from the point C to start the light measurement to the point D where the light measurement ends, and the results of the measurement are stored in the data as light measurement data. When the light measurement is finished, it is processed at the CPU and the value of exposure or the characteristic curve of the light sensitive matieial, for example, is displayed as a graph. |
