The SP90409 optical camera trigger is an InGaAs photodiode sensor that detects pulsed light sources and generates outputs to trigger a camera. The front aperture of the Optical Trigger must be directed at a light source that provides the necessary properties for trigger activation. (e.g. a laser flash lamp, a pick-off source from the main laser beam, or similar). The light source may be a direct or indirect pulsed waveform. The Optical Trigger system is supplied with a C-Mount adapter, a ¼-20 adapter, M6-1.0 adapter, or Through-Hole adapter options which allows attachment of the Optical Triger in a multitude of mounting configurations. One trigger cable and one mount option comes with the photodiode trigger. Specify one of each at time of order. See user guide for camera specific mounting options.