OPHTHALMOLOGIC APPARATUS AND CONTROL METHOD OF OPHTHALMOLOGIC APPARATUS

• Main Authors: MORISHIMA SHUNICHI, FUJINO MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 19.12.2019
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY; TESTING

To provide a new technology to achieve reduction in size and reduction in cost of an ophthalmologic apparatus without affecting measurement accuracy.SOLUTION: An ophthalmologic apparatus includes an objective lens, an examination optical system, a focusing lens, an optical scanner, and a control unit. The examination optical system projects a light from a light source onto an eye to be examined through the objective lens, and detects a return light from the eye to be examined. The focusing lens is disposed between the objective lens and the examination optical system, and can be moved in an optical axis direction of the objective lens. The optical scanner is disposed so that a deflection surface is positioned at a focal position of the focusing lens between the focusing lens and the examination optical system, and can be moved in an optical axis direction. The control unit executes focusing control by moving the focusing lens and the optical scanner so that positional relationships between the focusing lens and the optical scanner are maintained.SELECTED DRAWING: Figure 3 【課題】計測精度に影響を与えることなく眼科装置の小型化及び低コスト化を実現するための新たな技術を提供する。【解決手段】眼科装置は、対物レンズと、検査光学系と、合焦レンズと、光スキャナーと、制御部と、を含む。検査光学系は、光源からの光を対物レンズを介して被検眼に照射し、被検眼からの戻り光を検出する。合焦レンズは、対物レンズと検査光学系との間に配置され、対物レンズの光軸方向に移動可能である。光スキャナーは、合焦レンズと検査光学系との間において合焦レンズの焦点位置に偏向面が位置するように配置され、光軸方向に移動可能である。制御部は、合焦レンズと光スキャナーとの位置関係が維持されるように合焦レンズ及び光スキャナーを移動させることにより合焦制御を行う。【選択図】図３