Patent ID: 11953705
Assignee: ASIA OPTICAL CO., INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. An optical device comprising:
an objective module;
a prism module comprising a first prism, a second prism, a third prism and a first coating wherein the first prism comprises a first surface, a second surface, a third surface and a fourth surface; the second prism comprises a fifth surface, a sixth surface and a seventh surface; the seventh surface of the second prism adjoins the third surface of the first prism; the third prism comprises an eighth surface, a ninth surface and a tenth surface; the eighth surface is disposed to face the sixth surface of the second prism; the first coating is disposed between the third surface and the seventh surface; a first light beam is emitted by an object, enters the first prism through the first surface, is reflected on the fourth surface, sequentially passes through the third surface and the seventh surface, enters the second prism, is reflected on the fifth surface, leaves from the sixth surface of the second prism, enters the third prism through the eighth surface, is sequentially reflected on the ninth surface and the tenth surface, passes through the eighth surface and leaves the third prism; and the first light beam passes through the first coating and propagates towards the seventh surface; and
an ocular module;
wherein the prism module is disposed between the objective module and the ocular module, the first light beam sequentially passes through the objective module, the prism module and the ocular module, and central axes of the objective module and the ocular module are in parallel without overlapping.