Patent ID: 8848281
Filing Date: 2014-09-30
Classification: G02F

Abstract:
1. A wavelength conversion apparatus comprising: an input section into which input light is input; a wavelength converting section that includes a polarity inverting structure whose polarity inverts periodically and that, in response to the input of light having a wavelength corresponding to the period with which the polarity inverts, converts the wavelength of the light; and a direction changing section that changes a progression direction in which the input light passes through the polarity inverting structure, according to the wavelength of the input light, without changing relative positions of the input section and the polarity inverting structure; wherein the wavelength converting section further includes an indented portion that is a recess formed within a surface into which light is input and that causes distance from a point at which the direction changing section changes the direction of the input light to a point at which the input light reaches the wavelength converting section to be substantially constant.