Observation device
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United States of America Patent
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Nov 12, 2019
Grant Date -
Jan 11, 2018
app pub date -
Jul 6, 2017
filing date -
Jul 11, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
In an observation device including a display device, paired ocular optical systems each include a resin lens having a shape defined by an arch and a chord, and provided with a molding gate in an outer peripheral portion of the arc shape, and is appropriately set in: a difference RC between the radius of the resin lens and the length of a line connecting the midpoint of the chord and the point on the optical axis; the diameter D of the resin lens; an angle θ between a direction connecting a midpoint of a long side of the display surface and the point on the optical axis and a direction connecting the molding gate and the point on the optical axis; and an acute angle α between directions connecting the point on the optical axis and the respective molding gates of the resin lenses in the paired ocular optical systems.
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