JP2006309011A5 - - Google Patents

Claims (5)

A first lens system comprising a convex lens through which light is incident from the outside;
  A liquid crystal lens in which in-plane refractive index distribution of the liquid crystal layer is changed according to a voltage applied to the liquid crystal layer sealed between the opposing transparent substrates when the light passing through the first lens system is incident;
  A diaphragm made of a light-shielding film formed on a surface perpendicular to the optical axis of one transparent substrate of the liquid crystal lens;
  A second lens system comprising one or more lenses on which light that has passed through the liquid crystal lens enters,
  An imaging lens, wherein the light-shielding film constituting the diaphragm also serves as a heater that generates heat when energized.   A lens frame for fixing the first lens system, the liquid crystal lens, and the second lens system;
  The first lens system and the second lens system are inserted and fixed in the lens frame from the optical axis direction, and the liquid crystal lens is a through-hole provided in a side portion of the lens frame. The imaging lens according to claim 1, wherein the imaging lens is inserted and fixed between the first lens system and the second lens system in the lens frame. The imaging lens according to claim 1 or 2 ,
An image sensor element that receives light passing through the imaging lens and converts it into an electrical signal;
A camera module comprising: The camera module according to claim 3 , wherein an infrared cut filter is provided between the imaging lens and the image sensor element. 5. The camera module according to claim 3 , wherein driving means for generating a voltage to be applied to the liquid crystal lens is provided outside the lens frame. 6.