The laser emission and reception optical system consists of two major parts: the emission optical module and the reception optical module. A light reception/emission element module of the disclosure of the present invention is provided with a substrate, a light emission element disposed on the substrate, a first light reception element disposed on the substrate apart from the light emission element, and an upper wall positioned above. Building on three decades of LED expertise, Lumex expanded its portfolio to include infrared emitters and receivers so customers can obtain everything from low-current indicators to multi-watt illuminators from a single engineering-focused partner. The IR line offers multiple wavelengths, beam. Photoelectric sensors operate by an emitter unit producing a beam of modulated light that is detected by a receiver, either free-standing or in the same housing, and sensing action occurs when the beam is broken by an object. In the related art, as a light reception/emission element module, a reflection type optical coupling device in which a light emitting portion and a light receiving por-tion are mounted on. In this paper, a four-channel optical emission module is developed using hybrid integration technology that integrates directly modulated laser (DML) chips, low-noise amplifier (LNA) chips, and control circuits, with dimensions of 24.
