OBSERVATION OPTICAL SYSTEM, AND IMAGE DISPLAYING APPARATUS HAVING THE SAME

摘要

In order to obtain an observation optical system which has high optical performance while having a wide field of view, and can easily reduce variation of aberration at the time when an eye relief has changed, the present invention provides an observation optical system which is used for an observer to observe an image displayed on an image display surface, and includes in order from an observation side to an image displaying surface side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power, wherein a focal length f1 of the first lens, a focal length f2 of the second lens and a focal length f3 of the third lens are each appropriately set so as to satisfy the conditional expression of:;0.40

主权项

1. An observation optical system for observation of an image displayed on an image display surface comprising, in order from an observation side to an image displaying surface side:
a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power, wherein when a focal length of the first lens is represented by f1, a focal length of the second lens is represented by f2, and a focal length of the third lens is represented by f3, the following conditional expression is satisfied:0.40