Optical element and optical measurement device using the optical element

An optical element comprising:

• a light-emitting prism including a light-output face from which a light to be emitted to a sample is outputted;
• a light-receiving prism including a light-receiving face which receives the light returned from said sample;
• and
• a light intensity-reducing part provided between said light-emitting prism and said light-receiving prism;
• wherein said light intensity-reducing part is a light-blocking part provided between said light-emitting prism and said light-receiving prism;
• said light-emitting prism and said light-receiving prism are combined to form a recessed part with which said sample makes contact;
• and
• a light outputted from said light-output face enters said light-receiving face by traveling straight in said sample in contact with said recessed part,
• wherein said light-output face of said light-emitting prism is a first slope part which is planar and in contact with said sample;
• said light-receiving face of said light-receiving prism is a second slope part which is planar and in contact with said sample;
• and
• said first slope part and said second slope part are facing to form said recessed part, and a cross section of said recessed part in the direction vertical to said first slope part and said second slope part is roughly a shape of the letter V, and
• said optical element further comprising a cover for covering a part of said recessed part and for forming a sample holding part in combination with said light-emitting prism and said light-receiving prism.

An optical element comprising:

• a light-emitting prism including a light-output face from which a light to be emitted to a sample is outputted;
• a light-receiving prism including a light-receiving face which receives the light returned from said sample;
• and
• a light intensity-reducing part provided between said light-emitting prism and said light-receiving prism;
• wherein said light intensity-reducing part is a light-blocking part provided between said light-emitting prism and said light-receiving prism;
• said light-emitting prism and said light-receiving prism are combined to form a recessed part with which said sample makes contact;
• and
• a light outputted from said light-output face enters said light-receiving face by traveling straight in said sample in contact with said recessed part;
• wherein said light-output face of said light-emitting prism is a first slope part which is planar and in contact with said sample;
• said light-receiving face of said light-receiving prism is a second slope part which is planar and in contact with said sample;
• and
• said first slope part and said second slope part are facing to form said recessed part, and a cross section of said recessed part in the direction vertical to said first slope part and said second slope part is roughly a shape of the letter V, and
• said optical element further comprising an adjusting means for adjusting a distance between said light-emitting prism and said light-receiving prism.