| 摘要 |
The present invention obtains an eyepiece optical system which supports an object displayed on a compact image display element while magnifying the object at a high magnification ratio, has a wide apparent field of view with a short focal distance while having a long distance to the eye point, and is capable of successfully correcting aberrations to achieve excellent optical performance as well as increasing the pupil diameter. An eyepiece optical system which is characterized by comprising, in order from the object side to the eye side, a meniscus first lens (L1 or L1') having the concave surface thereof facing the object side, a second lens (L2) having a positive refractive power, a third lens (L3 or L3') having a negative refractive power, and a fourth lens (L4 or L4') having a positive refractive power. |
