Normal incidence broadband spectroscopic polarimeter and optical measurement system

An optical measurement system, comprising a normal incidence broadband spectroscopic polarimeter, comprising a light source, a beam splitting element, a focusing unit, a polarizer, a first curved reflector element, a first flat reflector element and a detection unit, wherein:

• the beam splitting element is set in an optical path between the light source and the focusing unit, and is used to pass through part of the beam from the light source before incident on the focusing unit, and to receive a beam that is reflected from a sample and is in turn reflected by the flat reflector element, the first curved reflector element, goes through the polarizer and the focusing unit, and then to reflect the beam to the detection unit;
• the focusing unit is used to receive the beam passing through the beam splitting element and to converge the beam into a collimated beam;
• the polarizer set between the focusing unit and the first curved reflector element is used to pass through the collimated beam to the first curved reflector element;
• the first curved reflector element is used to receive the collimated beam of the polarizer and converge the beam into a focused beam;
• the first flat reflector element is used to receive the focused beam and reflect the focused beam and make it normal incidence onto the sample, as well as focus on the sample;
• and
• the detection unit is used to detect a beam that is reflected from the sample and is in turn reflected by the first flat reflector element, the first curved reflector element, and goes through the polarizer and the focusing unit and is then reflected by the beam splitting element.