Antivibration microscope

{
  "publication_number": "US6628457B2",
  "country": "US",
  "kind": "B2",
  "title": "Antivibration microscope",
  "abstract": "Angular speed sensors and acceleration sensors are built into the casing of a video-type stereoscopic microscope. The angle of rotation of the stereoscopic microscope detected by the angular speed sensors and the amount of shift of the stereoscopic microscope detected by the acceleration sensors are input to a microscope control unit. This microscope control unit controls a vibration compensator based on the result of the detection. The vibration compensator shifts a lens within a plane orthogonal to its the optical axis so that object light from a field is deflected to a direction parallel to the optical axes of individual zoom optical systems. The vertical width A V of the field and the working distance L of this video microscope satisfy the following inequality: 1/ A V >1/(11.46+0.011× L).",
  "claims": [
    "1. An antivibration microscope comprising: a microscope optical system which forms an image of an object lying in a field of a predetermined size, working distance L of said microscope optical system satisfing the condition 1/ A V >1/(11.46+0.011 ×L), where A V is the width of said field; a first sensor for measuring inclination of the whole microscope optical system; a second sensor for measuring movement of the whole microscope optical system; a deflecting device which deflects object light traveling through said microscope optical system to an arbitrary direction at an arbitrary angle; and a controlling unit for adjusting the direction and angle of deflection for said object light by said deflecting device based on the measurements by said first sensor and said second sensor, whereby said image is steady in spite of the inclination or the movement of the microscope optical system.",
    "2. The antivibration microscope according to claim 1, wherein said microscope optical system shoots a real image of the object lying in said field, to be displayed on a monitor.",
    "3. The antivibration microscope according to claim 1, wherein: said microscope optical system includes a plurality of lenses each having a power; and said deflecting device shifts only a part of the lenses included in said microscope optical system, within a plane orthogonal to its optical axis.",
    "4. The antivibration microscope according to claim 1, wherein: said microscope optical system includes a reflecting mirror for bending its optical axis; and said deflecting device inclines said reflecting mirror to an arbitrary direction at an arbitrary angle.",
    "5. The antivibration microscope according to claim 1, wherein said deflecting device includes a variable-angle prism inserted into said microscope optical system.",
    "6. An antivibration microscope comprising: a microscope optical system which forms an image of an object lying in a field of a predetermined size, working distance L of said microscope optical system satisfiing the condition 1/ A V >1/(11.46+0.011 ×L), where A V is the width of said field; an image pickup device having an image taking surface which picks up the image formed on the image taking surface by said microscope optical system; a first sensor for measuring inclination of the whole microscope optical system; a second sensor for measuring movement of the whole microscope optical system; and a controlling unit for moving said image pickup device within a plane including the image taking surface based on the measurements by said first sensor and said second sensor so that the image of the object, lying in a predetermined field, formed by said microscope optical system can be picked up at a fixed position on the image taking surface of said image pickup device."
  ],
  "cpc": [
    "G02B 27/646",
    "A61B 90/20",
    "A61B 90/25",
    "A61B 90/36",
    "G02B 21/0012",
    "G02B 7/001"
  ],
  "assignees": [
    "ASAHI OPTICAL CO LTD"
  ],
  "filing_date": "2001-07-09",
  "publication_date": "2003-09-30",
  "grant_date": "2003-09-30",
  "priority_date": "2000-07-11",
  "application_number": "US-90094201-A",
  "family_id": "18706147",
  "citations": [
    "US5786936A"
  ]
}