OPTICAL ELEMENT, LIGHT EMITTING DEVICE, AND METHOD OF MANUFACTURING OPTICAL ELEMENT

摘要

An optical element capable of converting light of a specified wavelength emitted from a light source into light of a different wavelength before outputting and a method of manufacturing the optical element, the method of manufacturing the optical element comprising the steps of optically polishing a first crystal member (20) and a second crystal member (21) having mutually opposed surfaces with coefficients of linear expansion different by 5 ppm or more from each other so that the mutually opposed surfaces include crystal axes, applying acrylic adhesive agent having a glass transient point of 75 ° C or below onto the adhesive surface of the first crystal member (20) or the second crystal member (21), adhering the first crystal member (20) to the second crystal member (21), radiating light to the adhesive agent to harden the adhesive agent so as to form an adhesive agent layer (22) having a refractive index of 1.52 or less, and cutting the adhered crystal member to a specified size; the optical element whereby the separation and crystal rupture of the adhesive agent layer (22) connecting the first crystal member to the second crystal member can be suppressed.