CN201382906Y - Double-detector foreign matter detecting device of phase contrast technique - Google Patents

Abstract

The utility model relates to a double-detector foreign matter detecting device of phase contrast technique. A system in the prior art has complex system formation and low utilization coefficient of light energy, and is difficult to detect transparent or translucent foreign matters. The double-detector foreign matter detecting device of phase contrast technique utilizes the phase contrast technique or the cylindrical shaping technique, beams output by a light source component is shaped by a cylindrical shaper after passing through a beam concentrator, and the beams are compressed in a cylindrical optic axis direction which is vertical to the cylindrical shaper, are shot to two light-sensitive detector arrays which are arranged in a crossing way after passing through a phase contrast device, an image-forming object lens component and a beam splitter, and detected bottled liquid is arranged on an optical path arranged between a light beam convergence device and the image-forming object lens component. Signals collected by the light-sensitive detector arrays are analyzed, and information that a detected bottled liquid product contains foreign matters is obtained. The double-detector foreign matter detecting device has the advantages of high efficiency of detecting transparent or translucent foreign matters, high sensitivity and signal-to-noise ratio, simple and reasonable structure, low mechanical positioning requirements, high light energy utilization ratio and the like.

Description

A kind of phase-contrast technique double detector detection device for foreign matter

Technical field

The utility model belongs to the optical detective technology field, relates to a kind of phase-contrast technique double detector detection device for foreign matter.

Technical background

Detection device for foreign matter typically refers in productions such as medicine, beverage and quality inspection process, the device that fluid products such as transparent or semitransparent medicine, infusion bottle, oral liquid are carried out quality testing.Along with the day by day attention of people to medicine and food quality, and country's perfect to medicine and food control system, standard and flow process, the requisite testing process of foreign matter detection day by day becoming in the fluid products such as medicine, beverage.At present, adopt artificial lamp detection method in production and the quality inspection real process usually, promptly shine under the condition at certain lamp, the testing staff directly observes the bottling liquid product with human eye, whether contains foreign matter in the inspection fluid product, and contains foreign matter size, quantity etc.The method man power and material's input amount is big, and monitoring efficient and automaticity are low, and examination criteria is difficult to control adjustment.For overcoming the deficiency of manual detection, Automatic Measurement Technique and device are studied and design, the automatic foreign body checking machine that formerly has a kind of dual signal reception in the technology is (referring to utility model patent " automatic foreign body checking machine that dual signal receives ", utility model patent number: ZL200720074851.6), be disposed with the luminotron assembly on the light path in this device, light emission collecting lens, the light-receiving collecting lens, the imaging mirror, spectroscope, and the diaphragm and the optical receiving sensor array that are provided with on two beam split light paths, utilize that diaphragm raising system gets signal to noise ratio (S/N ratio) and sensitivity in the light path, this device has certain advantage, but still exist not enough: utilize diaphragm raising system to get signal to noise ratio (S/N ratio) and sensitivity, it is limited that signal to noise ratio (S/N ratio) and sensitivity improve degree; Optical receiving sensor array the place ahead on two beam split light paths all is provided with diaphragm, and the diaphragm inconsistency can exert an influence to detecting performance, and the efficiency of light energy utilization is low; Be difficult to detect foreign matter like light transmission features and the liquid phase of living in, promptly be difficult to the detected phase foreign matter.

Summary of the invention

The purpose of this utility model has been to overcome the deficiency of above-mentioned technology formerly, provides a kind of cylinder shaping double detector complementary detection device for foreign matter.

The utility model comprises light source assembly, beam convergence device, cylinder reshaper, phase contrast assembly, image-forming objective lens assembly, spectroscope, first photodetector array, second photodetector array; Beam convergence device, cylinder reshaper, phase contrast assembly, image-forming objective lens assembly, spectroscope, first photodetector array are successively set on the light source assembly outgoing beam light path, and detected bottling liquid product is arranged on the light path between beam convergence device and the phase contrast assembly; Spectroscopical light splitting surface and spectroscope incident beam optical axis included angle scope are 10 °～170 °; Second photodetector array is arranged on the light source assembly outgoing beam by on the reflected light path after the spectroscope reflection; The angle of cut scope of the photoelectric sensing unit cell arrangement direction of the cylinder optical axis direction of cylinder reshaper and first photodetector array is less than 30 °; The photoelectric sensing unit of second photodetector array with respect to the photoelectric sensing unit of the relative orientation of incident beam and first photodetector array with respect to the angle of cut scope of the relative orientation of incident beam less than 30 °; First photodetector array exists and shifts to install with respect to the position that is provided with of incident ray primary optical axis with respect to be provided with position and second photodetector array of incident ray primary optical axis.

Described light source assembly is a kind of of incoherent light source component, coherent source assembly, incoherent light source array, coherent source array, optical fiber source.

Described image-forming objective lens assembly is a kind of of achromatic objective, apochromatic objective, flat field image-forming objective lens, polarized light image-forming objective lens, the image-forming objective lens that matches.

Described photodetector array is a kind of of photosensitive tube array, photodiode array, charge-coupled image sensor, complementary metal-oxide-semiconductor transistor, optics microchannel plate.

The utility model beneficial effect is, compared with prior art, owing to adopted the cylinder reshaper that the light source assembly outgoing beam is carried out the asymmetric shaping, beam shape conforms to the photoelectric sensing unit cell arrangement direction of photodetector array after the shaping, sensitivity and signal to noise ratio (S/N ratio) that foreign matter detects have been improved, simplified system architecture, reduced and realized required expense and mechanical positioning requirement, owing to adopted the phase-contrast technique can the efficient detection phase foreign body, promptly high-level efficiency detects transparent or semitransparent foreign matter.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Below in conjunction with embodiment the utility model is described in further detail.

As Fig. 1, a kind of phase-contrast technique double detector detection device for foreign matter comprises light source assembly 1, beam convergence device 2, cylinder reshaper 3, phase contrast assembly 5, image-forming objective lens assembly 6, spectroscope 7, first photodetector array 8, second photodetector array 9; Beam convergence device 2, cylinder reshaper 3, phase contrast assembly 5, image-forming objective lens assembly 6, spectroscope 7, first photodetector array 8 are successively set on the light source assembly 1 outgoing beam light path, and detected bottling liquid product 4 is arranged on the light path between beam convergence device 2 and the phase contrast assembly 5; The light splitting surface of spectroscope 7 and spectroscope 7 incident beam optical axis included angle scopes are 10 °～170 °; Second photodetector array 9 is arranged on the reflected light path of light source assembly 1 outgoing beam after by spectroscope 7 reflection; The angle of cut scope of the photoelectric sensing unit cell arrangement direction of the cylinder optical axis direction of cylinder reshaper 3 and first photodetector array 8 is less than 30 °; The photoelectric sensing unit of second photodetector array 9 with respect to the photoelectric sensing unit of the relative orientation of incident beam and first photodetector array 8 with respect to the angle of cut scope of the relative orientation of incident beam less than 30 °; First photodetector array 8 exists and shifts to install with respect to the position that is provided with of incident ray primary optical axis with respect to be provided with position and second photodetector array 9 of incident ray primary optical axis.

Light source assembly 1 adopts the incoherent light source array, beam convergence device 2 is the beam collimation reshaper, phase contrast assembly 5 adopts Ze Nike phase contrast assembly, and image-forming objective lens assembly 6 adopts the flat field image-forming objective lens, and first photodetector array 8 and second photodetector array 9 all adopt photodiode array; The light splitting surface of spectroscope 7 and spectroscope 7 incident beam optical axis included angles are 30 °; Detected bottling liquid product 4 is the transparent medicine of injection in the present embodiment, and detected bottling liquid product 4 is arranged on the light path between cylinder reshaper 3 and the phase contrast assembly 5.

The utility model course of work is after light source assembly 1 outgoing beam is assembled shaping through beam convergence device 2, directive cylinder reshaper 3, and 3 pairs of light beams of cylinder reshaper carry out asymmetric shaping, form sheet beam; Detected bottling liquid product 4 is arranged on the light path between cylinder reshaper 3 and the phase contrast assembly 5, through the detected bottling liquid product 4 back directive phase contrast assemblies 5 of the light beam process of cylinder reshaper 3 shapings, phase contrast assembly 5 realizes that the phase information of phase foreign bodies is after the conversion of amplitude information; Light beam after the conversion is provided with first photodetector array 8 through spectroscope 7 transmitted light paths, be provided with second photodetector array 9 through spectroscope 7 reflected light paths, the photoelectric sensing unit of second photodetector array 9 is 0 ° with respect to the photoelectric sensing unit of the relative orientation of incident beam and first photodetector array 8 with respect to the angle of cut of the relative orientation of incident beam, is parallel to each other; The photoelectric sensing unit cell arrangement direction of the cylinder optical axis direction of cylinder reshaper 3 and first photodetector array 8 is parallel to each other, and beam shaping is compressed at the cylinder optical axis direction perpendicular to cylinder reshaper 3; First photodetector array 8 exists and shifts to install with respect to the position that is provided with of incident ray primary optical axis with respect to be provided with position and second photodetector array 9 of incident ray primary optical axis, and the dislocation distance is 1/2nd of a photoelectric sensing unit size; First photodetector array 8 and second photodetector array 9 all collect sheet beam through the optical information behind the detected bottling liquid product 4, owing to exist 1/2nd staggered positions of photoelectric sensing unit size to eliminate the influence of photodetector detection blind area to measuring; The information that first photodetector array 8 and second photodetector array 9 detect is analyzed, just obtained the situation that detected bottling liquid product 4 contains foreign matter.3 pairs of light beams of cylinder reshaper have carried out compressing perpendicular to the cylinder optical axis direction of cylinder reshaper 3 among the utility model embodiment, play iris action, improved signal to noise ratio (S/N ratio), efficiency of light energy utilization height utilizes phase-contrast technique to realize that transparent or semitransparent foreign matter detects simultaneously.

The utility model provides a kind of Double-detector foreign matter detecting device of phase contrast technique, successfully realizes Phase foreign body in the fluid product detect, sensitivity and signal to noise ratio height that foreign matter detects have and establish Count reasonable, simple in structure, realize that low, the mechanical positioning requirements of required expense is low, the efficiency of light energy utilization is high Etc. characteristics, and owing to adopted phase-contrast technique, the utility model is detected phase efficiently Foreign matter, namely high efficiency detects transparent or semitransparent foreign matter.

Claims (4)

1, a kind of phase-contrast technique double detector detection device for foreign matter, comprise light source assembly, beam convergence device, cylinder reshaper, phase contrast assembly, image-forming objective lens assembly, spectroscope, first photodetector array, second photodetector array, it is characterized in that: beam convergence device, cylinder reshaper, phase contrast assembly, image-forming objective lens assembly, spectroscope, first photodetector array are successively set on the light source assembly outgoing beam light path, and detected bottling liquid product is arranged on the light path between beam convergence device and the phase contrast assembly; Spectroscopical light splitting surface and spectroscope incident beam optical axis included angle scope are 10 °～170 °; Second photodetector array is arranged on the light source assembly outgoing beam by on the reflected light path after the spectroscope reflection; The angle of cut scope of the photoelectric sensing unit cell arrangement direction of the cylinder optical axis direction of cylinder reshaper and first photodetector array is less than 30 °; The photoelectric sensing unit of second photodetector array with respect to the photoelectric sensing unit of the relative orientation of incident beam and first photodetector array with respect to the angle of cut scope of the relative orientation of incident beam less than 30 °; First photodetector array exists and shifts to install with respect to the position that is provided with of incident ray primary optical axis with respect to be provided with position and second photodetector array of incident ray primary optical axis.

2, a kind of phase-contrast technique double detector detection device for foreign matter as claimed in claim 1 is characterized in that: described light source assembly is a kind of of incoherent light source component, coherent source assembly, incoherent light source array, coherent source array, optical fiber source.

3, a kind of phase-contrast technique double detector detection device for foreign matter as claimed in claim 1 is characterized in that: described image-forming objective lens assembly be a kind of of achromatic objective, apochromatic objective, flat field image-forming objective lens, polarized light image-forming objective lens, the image-forming objective lens that matches.

4, a kind of phase-contrast technique double detector detection device for foreign matter as claimed in claim 1 is characterized in that: described photodetector array is a kind of of photosensitive tube array, photodiode array, charge-coupled image sensor, complementary metal-oxide-semiconductor transistor, optics microchannel plate.

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