La78040 circuit diagram, including the voltage of each pin. The short wave pass filter is a cut-off filter in the interference filter. The cut-off filter is divided into long wave pass filter and short wave pass filter, that is, the beam in a certain wavelength range is required to be transmitted, and the beam deviating from this wavelength changes to cut-off, Usually, we call the filter in the reflection (cut-off) short wave area and transmission long wave area as long wave pass filter. On the contrary, the short wave direction is transmitted, while the long wave direction is cut-off. What plays the role of isolating long waves is called short wave pass filter. short wave pass filter Hanzhong Hengpu Photoelectric Technology Co.,Ltd , https://www.hplenses.com