BS 4793 standard discusses the recommendations for specifying the optical performance of lenses for television cameras. The television camera is a device that employs light-sensitive image sensors to convert an optical image into a sequence of electrical signals, in other words, to generate the primary components of the picture signal.
BS 4793 specifies these recommendations for the specification and assessment of the optical performance of lenses for use with television cameras. These may be either zoom lenses, variable focal length lenses, or single focal length lenses, and they may be required to operate in either black-and-white or colour reproduction systems. A special feature of these recommendations is that they adopt the optical transfer function (OTF), or more specifically its modulus, the modulation transfer function (MTF), as a method of assessing and specifying image quality.
BS 4793 on television cameras applies to:
The television camera is a device that employs light-sensitive image sensors to convert an optical image into a sequence of electrical signals—in other words, to generate the primary components of the picture signal.
BS 4793 provides you with the optical transfer function (OTF) which is a complex function in which the modulus is the modulation transfer function and the argument is the phase transfer function. The modulation transfer function (MTF) is the variation of the modulation transfer factor with the spatial frequency defined to be the modulation transfer function. This function is normalized to unity at zero spatial frequency.
BS 4793 provides you with optical performance monitoring which helps you in accessing the quality of the data channel by measuring its optical characteristics without directly looking at the transmitted sequence of bits. It is a potential mechanism to improve control of transmission and physical layer fault management in optical transmission systems.
BS 4793 provides you with comprehensive guidance useful throughout the process of production.