Green laser sources optimized for highly efficient microdisplay‐based field‐sequential mobile projectors

Abstract— A novel green laser source, based on a monolithic cavity microchip laser platform, has been developed. The laser is designed to be a part of a miniature and efficient RGB light source for microdisplay‐based mobile projector devices. The use of highly efficient, periodically poled MgO‐doped lithium niobate as the non‐linear frequency doubler allows for a significant increase in the overall efficiency of the green microchip laser. Specifically, a 50–150‐mW green output with a wall‐plug efficiency exceeding 10% in the temperature range of greater than 40°C has been demonstrated. A compact package for this laser source with a volume less than 0.33 cm³ is discussed and results of performance tests are presented.     

Fibre Chemisorbents Based on Modified Graft Copolymers of Cellulose and Polycaproamide

A general characterization of chemisorption fibres with complexing properties is given. The specific features of the effect of the polymer matrix of fibre chemisorbents manufactured by hydrazidation of graft copolymers of cellulose (or polycaproamide) and polyacrylonitrile on the sorption properties, selectivity of sorption of metal ions, and stability of the properties in conditions simulating the conditions of use are examined.     

Graft polymerization of methacrylic acid to polycaproamide using a redox system containing Cu2+ ions

Graft polymerization of methacrylic acid to polycaproamide initiated by the reversible redox system K₂S₂O₈-Na₂S₂O₃-Cu²⁺ was investigated. The contribution of each component of the initiating system within wide concentration limits to the mechanism of initiation of grafting and breaking of the growing polymer chain was established. Hypotheses were advanced concerning the mechanism of graft polymerization of methacrylic acid to polycaproamide.Translated from Khimicheskie Volokna, No. 1, pp. 27–30, January–February, 1995.     

Properties of polycaproamide fibres which have been modified by grafting polyacrylonitrile

Conclusions The properties of modified polycaproamide fibres containing various amounts of grafted polyacrylonitrile have been investigated.It has been shown that the attachment of polyacrylonitrile to polycaproamide fibres leads to an improvement in a number of properties (light resistance, heat resistance, wool-like appearance) which determine the customer acceptance of fibres and articles made from them.Translated from Khimicheskie Volokna, No. 3, pp. 32–33, May–June, 1984.