| 摘要 |
An optical system ( 10 ) operatively associated with lenses ( 120 ) with adjustable focal length is provided. The optical system includes a first lens assembly ( 12 ), at least one heat control device ( 122 ) and a first barrel ( 14 ). The at least one heat control device is configured for regulating a temperature of the at least one lens so as to finely change a refractive index of the at least one lens, whereby the focal length associated with the first lens assembly is adjusted. The first barrel is configured for receiving the first lens assembly therein.
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