CN210055965U

CN210055965U - Wide-angle type electronic cystoscope lighting lens

Info

Publication number: CN210055965U
Application number: CN201920330594.0U
Authority: CN
Inventors: 陈尧松; 赵静
Original assignee: HANGZHOU HAWK OPTICAL ELECTRONIC INSTRUMENTS CO Ltd
Current assignee: HANGZHOU HAWK OPTICAL ELECTRONIC INSTRUMENTS CO Ltd
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2020-02-14
Anticipated expiration: 2029-03-15

Abstract

The utility model relates to an endoscope especially relates to a wide-angle type's electronic cystoscope's illumination camera lens. The wide-angle electronic cystoscope illuminating lens comprises an imaging lens, wherein an illuminating unit is arranged on one side of the imaging lens and comprises an illuminating lens, a light guide beam is arranged at one end of the illuminating lens, the upper end surface of the illuminating lens is a plane, the lower end surface of the illuminating lens is an upwards-concave cambered surface, and the cambered surface is connected with the light guide beam. The utility model provides a lighting lens of a wide-angle electronic cystoscope, which has simple and compact structure, good divergence effect, small illumination loss and low cost; the technical problems of complex structure, serious illumination loss and high cost of the electronic cystoscope in the prior art are solved.

Description

Wide-angle type electronic cystoscope lighting lens

Technical Field

The utility model relates to an endoscope especially relates to a wide-angle type's electronic cystoscope's illumination camera lens.

Background

With the rapid development of medical technology, endoscopes are also widely applied in the medical field. An endoscope is a commonly used medical instrument, and is composed of an insertion portion, a bending portion, and a distal end portion provided at a distal end of an operation portion, wherein the insertion portion, the bending portion, and the distal end portion are collectively referred to as an insertion tube. Enters the human body through natural pore canals of the human body or small incisions made by operation; when in use, the insertion tube of the endoscope is introduced into the organ to be inspected, and the change of the relevant part can be directly observed.

At the front end, in general, for the convenience of observation, we need to install an imaging lens. When a medical endoscope is used for inspecting a large inner cavity of a human body, a camera sensor with a large field angle is often used, so that the observation field of view can be increased, and misdiagnosis and missed diagnosis can be reduced. It is generally considered that when the angle of view is larger than 120 °, the field of view falls into the wide-angle range. The lighting lens of the wide-angle endoscope in the current market mostly adopts a multi-piece lens structure. Although the light scattering effect of the structure is good, the structure is complex, the cost is high, the light loss is serious, and the size is large, so that the miniaturization is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lighting lens of a wide-angle electronic cystoscope, which has simple and compact structure, good divergence effect, small illumination loss and low cost; the technical problems of complex structure, serious illumination loss and high cost of the electronic cystoscope in the prior art are solved.

The above technical problem of the present invention is solved by the following technical solutions: the wide-angle electronic cystoscope illuminating lens comprises an imaging lens, wherein an illuminating unit is arranged on one side of the imaging lens and comprises an illuminating lens, a light guide beam is arranged at one end of the illuminating lens, the upper end surface of the illuminating lens is a plane, the lower end surface of the illuminating lens is an upwards-concave cambered surface, and the cambered surface is connected with the light guide beam. The illumination lens is a planoconcave lens, the outer surface is planoconcave and concave, the concave surface refracts light once, and then refracts and diverges for the second time through the plane to form a larger illumination angle, so that illumination in the whole view field is uniform, and the difference value between the light spot edge and the central illumination is small. The illuminating lens has simple structure and small volume, and can ensure that the structure of the illuminating lens part at the end part of the whole electronic cystoscope is more compact and the volume is small.

Preferably, the lighting units are at least two groups, and the lighting units are uniformly distributed on the outer side of the molding lens. A plurality of lighting units are uniformly distributed on the periphery of the forming lens, so that shadows can be reduced as much as possible, the field-of-view illumination effect is improved, diagnosis and observation of doctors are facilitated, and the imaging effect is improved.

Preferably, the imaging lens is connected with a CMOS sensor, and the CMOS sensor is connected with a cable.

Preferably, the illumination angle formed by the illumination lens is not smaller than the formed field angle of the imaging lens. High-quality wide-angle imaging is realized, and misdiagnosis and missed diagnosis are reduced. The divergence effect is good, and the illumination loss is small.

Preferably, the length of the illumination lens is 0.4 mm-0.6 mm. General lighting lens's axial length is 1.5~4.5mm, the utility model discloses a concave type lens lets axial length shorten to make the small of whole camera lens, compact structure.

Preferably, the illuminating lens and the imaging lens are arranged in parallel.

Preferably, one side of the illumination lens is provided with a light guide bundle end sleeve, and a plurality of optical fiber bundles are installed in the light guide bundle end sleeve. The installation and the fixed of leaded light bundle are convenient.

Therefore, the utility model discloses a wide angle type electron cystoscope lighting lens possesses following advantage: simple structure, the plano-concave type lens axial length is little, and whole small and exquisite compactness disperses effectually, evenly arranges lighting unit at imaging lens periphery, and illuminance loss is little, can effectively increase the observation field of vision, reduces the misdiagnosis and neglects the emergence of diagnosing the condition.

Drawings

Fig. 1 is a schematic view of an illumination lens of a wide-angle electronic cystoscope.

Fig. 2 is a schematic view of the light divergence of the illumination lens of fig. 1.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b):

as shown in figures 1 and 2, the wide-angle electronic cystoscope illumination lens comprises an imaging lens 4, wherein one end of the imaging lens 4 is connected with a CMOS sensor 5, the CMOS sensor 5 connects a collected image to a display through a cable 6, two sides of the imaging lens 4 are respectively provided with an illumination unit by taking the imaging lens 4 as a center, the illumination unit comprises an illumination lens 1, the upper end surface of the illumination lens is a plane 7, the lower end surface of the illumination lens is an upward concave arc surface 8, the length of the illumination lens 1 is 0.5mm, one end of the illumination lens 1 is connected with a light guide beam end sleeve 2, a plurality of plastic light guide beams 3 are arranged in the light guide beam end sleeve 2, and light of the light guide beams 3 is diffused by the illumination lens to form an illumination angle α which is larger than or equal to the field angle β of the imaging lens, so that uniform illumination in the whole field of view is ensured, and the difference between the edge of a light spot and.

Claims

1. The utility model provides a wide angle type electron cystoscope lighting lens, includes imaging lens, its characterized in that: the imaging lens is characterized in that an illuminating unit is arranged on one side of the imaging lens and comprises an illuminating lens, a light guide beam is arranged at one end of the illuminating lens, the upper end face of the illuminating lens is a plane, the lower end face of the illuminating lens is an upwards-concave cambered surface, and the cambered surface is connected with the light guide beam.

2. The wide-angle electronic cystoscope illumination lens of claim 1, wherein: the lighting units are at least two groups and are uniformly distributed on the outer side of the molding lens.

3. A wide-angle type electronic cystoscope illumination lens according to claim 1 or 2, characterized in that: the imaging lens is connected with a CMOS sensor, and the CMOS sensor is connected with a cable.

4. A wide-angle type electronic cystoscope illumination lens according to claim 1 or 2, characterized in that: the illumination angle formed by the illumination lens is not less than the field angle formed by the imaging lens.

5. A wide-angle type electronic cystoscope illumination lens according to claim 1 or 2, characterized in that: the length of the illumination lens is 0.4 mm-0.6 mm.

6. A wide-angle type electronic cystoscope illumination lens according to claim 1 or 2, characterized in that: the illuminating lens and the imaging lens are arranged in parallel.

7. A wide-angle type electronic cystoscope illumination lens according to claim 1 or 2, characterized in that: one side of the illuminating lens is provided with a light guide bundle end sleeve, and a plurality of optical fiber bundles are installed in the light guide bundle end sleeve.