Patent ID: 7075728

Claim:
An image-capturing lens, comprising: a plastic lens formed with use of a material in which particles each having the maximum length of 30 nanometer or less are dispersed in a plastic material, wherein the plastic lens satisfies the following formula: | A| 8Ã—10 âˆ’5 /Â°C. where A represents a change of refractive index caused by a temperature change which is expressed by the following expression: A = ( n 2 + 2 ) â¢ ( n 2 - 1 ) 6 â¢ n â¢ { ( - 3 â¢ a + 1 [ R ] â¢ âˆ‚ [ R ] âˆ‚ t ) } Î±: Coefficient of linear expansion, [R]: Molecular refraction.