Photoelectric encoder for precise measurements

A photoelectric encoder comprising:

• a light source;
• a scale including a first optical grating for receiving irradiation of light from said light source;
• a plurality of light-receiving elements each having a light acceptance surface for incidence of an optical signal as generated based on the light falling onto said first optical grating, said plurality of light-receiving elements detecting a plurality of phase-different optical signals;
• and
• a second optical grating including more than one light shield portion disposed above each light acceptance surface of said plurality of light-receiving elements, and
• an optical receipt chip including said plurality of light-receiving elements and said second optical grating, wherein said optical receipt chip further includes,
• a contact portion provided for each of said plurality of light-receiving elements and connected to said light shield portion beneath said light shield portion with electrical conductivity while being in contact with said light acceptance surface, and
• an electrical wiring line provided for each of said plurality of light-receiving elements and connected to said light shield portion,
• wherein said plurality of light-receiving elements are disposed movably relative to said scale along a measurement axis and disposed along said measurement axis so that each light acceptance surface is slanted with respect to an extending direction of said light shield portion.