a.1.Pertaining to photology, or the doctrine of light.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Other products within the Optek range are infrared light emitting diodes (transmitters) and photologic detectors (receivers), optoelectronic assemblies and fiber optic sensors which are used in a broad range of markets including factory automation, medical, aerospace, data communications and office equipment markets.