Patent ID: 7286244
Filing Date: 2007-10-23
Classification: G01J,G01N,G02B

Abstract:
1. An analyzer including: an optical tunable filter for selectively outputting light having a predetermined wavelength, a light-receiving portion for receiving light outputted from the optical tunable filter and passed through or reflected by an object to be measured and a flow passage for placing the object to be measured, the optical tunable filter comprising: a first substrate including a movable portion having a light transmitting property, the first-substrate having a first surface; a second substrate having a light transmitting property, the second substrate being provided so as to face the first surface of the first substrate, the second substrate having a first surface facing the movable position and a second surface which is opposite to the first surface, the first surface of the second substrate being formed with a first concave portion for providing a first gap with the movable portion and a second concave portion, which is formed so as to be deeper than the first concave portion and is formed inside the first concave portion, for providing a second gap with the movable portion; an interference portion which causes interference with light that enters the optical tunable filter in the second gap and outputs the light having a predetermined wavelength corresponding to a distance of the second gap; and a driving portion for displacing the movable portion with respect to the second substrate by changing a distance of the first gap and a distance of the second gap.