Distance measurement device

A distance measurement device comprising:

• a light source that emits an infrared ray;
• a light receiving section that receives the infrared ray emitted from the light source and reflected by an object;
• and
• a band-pass filter member that is disposed on a light-receiving surface side of the light receiving section and through which the infrared ray is transmitted,
• wherein the band-pass filter member includes a band-pass filter, and a refraction member that is disposed in contact with the band-pass filter and refracts the infrared ray, and
• the refraction member is any one of a microlens array in which an angle formed by a normal line of the band-pass filter and a normal line of a curved surface of a microlens is 30° or less in all regions of the microlens, a lenticular lens in which an angle formed by a normal line of the band-pass filter and a normal line of a curved surface of a cylindrical lens is 30° or less in all regions of the cylindrical lens, or a prism sheet in which an inclined angle of a prism with respect to a surface of the band-pass filter is 30° or less.