Under operation of highly clear and accurate dot measurement and indication under dark environment and night version fields, it makes an efficient job with a long wavelength device of a 780nm infrared laser diode module. Being made with 795nm infrared laser diode as core component, equipped with qualified optic lens inside a highly durable anodized aluminum alloy housing tube, it is working well with highly concentrated and high density energy infrared laser light source emission, ultra clear and accurate infrared dot indication for all night version illumination fields.