# US 8,770,756 B2 · Ophthalmic apparatus

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- Number: US 8,770,756 B2
- Document ID: US8770756B2
- Status: Granted
- Kind: B2
- Application number: 13/398,069
- Filed: 2012-02-16
- Published: 2012-08-30
- Granted: 2014-07-08
- Earliest claimed: 2011-02-28
- Assignees: Canon Kabushiki Kaisha
- Applicants: Yasuhiro Dobashi
- Inventors: Yasuhiro Dobashi
- Web page: https://patentgrep.com/patent/US8770756B2

## CPC

- A61B 3/0075: {provided with adjusting devices, e.g. operated by control lever}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An ophthalmic apparatus in which a tilt angle of an operating rod corresponds to a position of an inspection unit adapted to inspect an eye to be examined, and a movable range of the inspection unit is wider than a tilt able range of the operating rod, the apparatus comprising: a detection unit adapted to detect the tilt angle of the operating rod by detecting an electrical signal generated by tilting the operating rod; a calculation unit adapted to calculate a position of the inspection unit which corresponds to the tilt angle; a moving unit adapted to move the inspection unit to a position calculated by the calculation unit; and a switching unit adapted to switch between interruption and resumption of calculation processing performed by the calculation unit.

## Claims

### Claim 1

An ophthalmic apparatus in which a tilt angle of an operating rod corresponds to a position of an inspection unit adapted to inspect an eye to be examined, the apparatus comprising:
a detection unit adapted to detect the tilt angle of the operating rod by detecting an electrical signal generated by tilting the operating rod;
a calculation unit adapted to calculate positional coordinates of the operating rod which correspond to respective tilt angles and to calculate a position of the inspection unit from changes in the calculated positional coordinates;
a moving unit adapted to move the inspection unit to a position calculated by said calculation unit; and
a switching unit adapted to switch between interruption and resumption of calculation processing of the position of the inspection unit performed by said calculation unit.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein when said switching unit interrupts the calculation processing, said moving unit holds a position of said detection unit set when said switching unit has interrupted the calculation processing even if the operating rod tilts.

### Claim 3 (depends on 1)

The apparatus according to claim 1, wherein the tiltable range of the operating rod comprises a circumference of a circle centered on a tilt supporting point of the operating rod and an interior portion of the circle.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein said switching unit switches between interruption and resumption of the calculation processing depending on whether a button arranged on the operating rod is pressed.