OPTICAL ELEMENT AND METHOD FOR MANUFACTURING SAME

摘要

PROBLEM TO BE SOLVED: To improve a transmittance for rays and a coefficient of thermal expansion of an optical element compared to a conventional one.

SOLUTION: An objective lens 7 is manufactured by kneading 100 parts by weight of a thermoplastic resin with 10 parts by weight to 80 parts by weight of inorganic fine particles having a ≤30 nm volume average dispersion particle size of primary particles while introducing 0.05 part by weight to 40 parts by weight of supercritical carbon dioxide to produce a combined material and then molding the obtained combined material.

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