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US 9,848,768 B2Granted
Target presenting apparatus
AssigneeNidek Co., Ltd.
InventorsYuichiro Kanazawa, Noriji Kawai, Ryoji Suzuki, Toshihiro Kobayashi, Yukito Hirayama, Kazunori Shibata
Life of this patent
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Abstract
A target presenting apparatus includes: a display for emitting a target light flux; a concave mirror for receiving the target light flux in such a manner as to displace the target light flux from an optical axis thereof; a housing for accommodating the concave mirror and the display therein; and an optical member, placed in the housing, for guiding the target light flux from the inside to the outside of the housing to present a target to an examinee.
Claims15
A target presenting apparatus comprising:
- a display for emitting a target light flux;
- a concave mirror for receiving the target light flux in such a manner as to displace the target light flux from an optical axis thereof;
- a housing for accommodating the concave mirror and the display therein;
- and
- an optical member, placed in the housing, for guiding the target light flux from the inside to the outside of the housing to present a target to an examinee,
- wherein an optical axis of the target light flux incident to the concave mirror is inclined with respect to the optical axis of the concave mirror;
- the optical member is configured to guide the target light flux reflected by the concave mirror, from the inside to the outside of the housing;
- and
- the optical member is a total reflection mirror which reflects substantially all of the target light flux incident to the optical member.
6 more elements
Dependencies are inferred from the claim text.