Optical module, optical device and wearable display device

An optical device comprising two sets of optical modules and a first base,

• the first base comprising a supporting side securing the two sets of optical modules, wherein the two sets of optical modules are symmetrically arranged relative to a central axis of the supporting side;
• and
• the two sets of optical modules comprising:
• a first optical unit, comprising a first lens having a positive focal length, a second lens having a negative focal length, and a third lens having a positive focal length, the first lens, the second lens and the third lens being sequentially arranged along an optical path of the first optical unit;
• and
• a second optical unit, comprising a fourth optical element having a positive focal length, the fourth optical element comprising a first aspheric surface, a second aspheric surface and a reflection surface, the reflection surface changing a direction of the optical path of the first optical unit towards an exit pupil.

An optical device comprising two sets of optical modules, the optical modules comprising:

• a first optical unit, comprising a first lens having a positive focal length, a second lens having a negative focal length, and a third lens having a positive focal length, the first lens, the second lens and the third lens being sequentially arranged along an optical path of the first optical unit;
• a second optical unit, comprising a fourth optical element having a positive focal length, the fourth optical element comprising a first aspheric surface, a second aspheric surface and a reflection surface, the reflection surface changing a direction of the optical path of the first optical unit towards an exit pupil;
• and
• a first base and a second base each securing one set of optical modules, the second base and the third base being symmetrically arranged relative to a central axis, and the optical modules, respectively secured by the first base and the second base, each having a light exiting direction defining an angle relative to the central axis.