Optical sample detection system and sample analysis device
View Patent ↗An optical sample detection system is provided, including a light source; a convergence projection component for converging light rays emitted by the light source; a sample accommodation component for accommodating a detected sample; a light beam collection component for receiving light rays carrying sample characteristic information and transmitted from the sample accommodation component; a light splitting component for splitting polychromatic lights collected by the light beam collection component into independent spectrums or spectral bands; and a photoelectric detection component for receiving optical signals of different wavelengths separated through the light splitting component.
1. An optical sample detection system, comprising:
a light source;
a convergence projection component configured for converging light rays emitted by the light source, the convergence projection component comprising:
a front optical system;
a rear optical system; and
an optical stop disposed between the front and rear optical systems, wherein an angle between a normal of an internal surface of the optical stop and an optical axis in a light beam propagation direction is greater than 90° such that stray light incident to the internal surface of the optical stop is refracted away from the rear optical system;
a sample accommodation component configured for accommodating a detected sample;
a light beam collection component configured for receiving light rays carrying sample information from the sample accommodation component;
a light splitting component configured for splitting polychromatic lights collected by the light beam collection component into independent spectrums or spectral bands; and
a photoelectric detection component configured for receiving optical signals of different wavelengths separated through the light splitting component.
2. The optical sample detection system according to claim 1 , wherein a front surface and a rear surface of the optical stop along the direction of the optical axis respectively correspond to a large hole and a small hole.
3. The optical sample detection system according to claim 1 , wherein the internal surface of the optical stop at least comprises one tapered surface.
4. The optical sample detection system according to claim 1 , wherein the internal surface of the optical stop at least comprises a hybrid surface of two tapered surfaces of different tapers.
5. The optical sample detection system according to claim 1 , wherein the internal surface of the optical stop at least comprises a hybrid surface of a cylindrical surface and a tapered surface.
6. The optical sample detection system according to claim 1 , wherein the internal surface of the optical stop at least comprises a continuous smooth curved surface.
7. The optical sample detection system according to claims 1 , wherein the optical stop comprises an internal surface processed by roughness increasing, extinction paint spraying, or blackening.
8. The optical sample detection system according to claim 1 , wherein the optical stop is made of a transparent material.
9. The optical sample detection system according to claim 8 , wherein the optical stop has an internal surface coated with an anti-reflective film.
10. The optical sample detection system according to claim 8 , wherein the optical stop comprises an external surface processed by roughness increasing, extinction paint spraying, or blackening.