endoscopic device

An endoscope and objective lens technology, applied to the field of endoscope devices, can solve the problem of not disclosing observation conditions and the like

Active Publication Date: 2015-09-02
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, in order to perform such operations smoothly, it is desired to have an endoscope device that satisfies the observation conditions that facilitate the screening inspection on the far point side, but the above-mentioned conventional examples do not disclose such observation conditions.

Method used

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no. 1 Embodiment approach

[0045] Such as figure 1As shown, the endoscope device 1 includes: an endoscope 2, which is inserted into the lumen; a light source device 3, which supplies the illumination light of the endoscope 2; an image processing device (or signal processing device) 4, which is aimed at Signal processing is carried out from the signal output from the imaging unit mounted on the endoscope 2; and the monitor 5 as a display unit is input with a standard video signal (image signal) output from the image processing device 4 to display the endoscope image.

[0046] The endoscope 2 in this embodiment has an elongated insertion portion 7 to be inserted into the subject, an operation portion 8 provided at the rear end of the insertion portion 7 and operated by an operator such as an operator, and The cable part 9 from which the operation part 8 extends.

[0047] The insertion portion 7 is provided with a rigid distal end portion 11 at its distal end, and an imaging unit 19 and the like forming ...

no. 2 Embodiment approach

[0149] Next, a second embodiment of the present invention will be described. The endoscope device of this embodiment and figure 1 Compared with the endoscope device 1 of the first embodiment shown, the objective optical system and the CCD are different. In this embodiment, the Figure 9 The objective optical system 17B shown also employs a CCD 18B whose pixel pitch P is 2.3 μm.

[0150] in addition, Figure 9 (A) and Figure 9 (B) is a cross-sectional view of the objective optical system 17B in the state set to the 1st focus position and the 5th focus position, respectively. The front lens group G1 of objective optical system 17B is made of concave lens L1, parallel plate L2 and convex lens L3 (26), and rear lens group G2 is made of diaphragm, convex lens L4, the cemented lens that is formed by convex lens L5 and concave lens L6, and parallel plate L7. In addition, flat optical elements I1 and I2 are arranged behind the parallel flat plate L7, and a CCD 18B having a mosai...

no. 3 Embodiment approach

[0162] Next, a third embodiment of the present invention will be described. and figure 1 Compared with the endoscope apparatus 1 of the first embodiment shown, the endoscope apparatus of this embodiment differs in the objective optical system and the CCD. In this embodiment, the Figure 12 The objective optical system 17C shown also employs a CCD 18C whose pixel pitch P is 1.4 μm.

[0163] in addition, Figure 12 (A) and Figure 12 (B) is a cross-sectional view of the objective optical system 17C in the state set to the 1st focus position and the 4th focus position, respectively.

[0164] The front lens group G1 of the objective optical system 17C is composed of a concave lens L1, a concave lens L2, and a convex lens L3 (26), and the rear lens group G2 is composed of a diaphragm, a convex lens L4, a cemented lens formed by a convex lens L5 and a concave lens L6, and parallel plates L7, L8. . In addition, flat optical elements I1 and I2 are arranged behind the parallel fl...

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Abstract

An endoscope apparatus includes an objective optical system mounted at a distal end portion of an endoscope, which is inserted into a tube cavity, and configured to form an image of an object in the tube cavity, the objective optical system including a focusing lens movable in an optical axis direction, a solid-state image pickup device for color image pickup configured to pick up the image formed by the objective optical system, a color separation filter being arranged for each pixel in the solid-state image pickup device, a focus adjusting mechanism configured to move the focusing lens and automatically adjust the objective optical system to a focus position in a focused state, etc. wherein, when the objective optical system is automatically adjusted to a focus position by the focus adjusting mechanism, resolving power equal to or larger than 35 µm is obtained at a focus position where a distance between the objective optical system and the object is equal to or smaller than 15 mm and, when a range in which MTF of a spatial frequency 1 / (3 × P) is equal to or higher than 10% is defined as width of depth of field, the objective optical system has width of depth of field equal to or larger than 5 mm.

Description

technical field [0001] The invention relates to an endoscope device with automatic focusing function. Background technique [0002] In recent years, endoscopes equipped with imaging units using solid-state imaging devices have been widely used in the medical field. [0003] In addition, an endoscope having an optical system having an autofocus function to enable detailed observation of an affected part, and an imaging unit using a solid-state imaging device with increased pixels has also been proposed. [0004] For example, a conventional example of Japanese Patent Application Laid-Open No. 2002-253489 discloses an endoscope apparatus that performs automatic focusing by moving a part of lenses in an objective optical system. [0005] In the above conventional example, if the magnification control part is activated by the operation of the switching part, the focus control part which is activated in conjunction with the control signal of the magnification control part is used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/28A61B1/00A61B1/04G02B7/36G02B23/24G02B21/02
CPCG02B7/36A61B1/0002A61B1/00045G02B23/2484A61B1/0661A61B1/00096A61B1/018G02B7/08G02B23/2469G02B23/2438A61B1/00188A61B1/045A61B1/051A61B1/00174A61B1/07A61B1/00009A61B1/0051
Inventor 笹本勉
Owner OLYMPUS CORP
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