Microscope objective lens, microscope optical system, and microscope device
US-2024045192-A1 · Feb 8, 2024 · US
Microscope objective lens
US12585099B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12585099-B2 |
| Application number | US-202318393606-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 21, 2023 |
| Priority date | Jun 21, 2023 |
| Publication date | Mar 24, 2026 |
| Grant date | Mar 24, 2026 |
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Abstract
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The present application relates to the field of optical lenses and discloses a microscope objective lens. The microscope objective lens includes in order from the emitting side to the objective side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a twelfth lens, and the following relationship expressions are satisfied: 1.50≤NA*f≤3.00; 0.15≤d4/TTL≤0.25; 5.00≤f12/f≤15.00; −7.00≤(R23+R24)/(R23−R24)≤−1.50. The microscope objective lens of the present application is capable of being used as a lens of the microscope with good optical performance, a large numerical aperture, and a wide working band with a magnification of 50 times.
First claim
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What is claimed is: 1 . A microscope objective lens, comprising in order from an emitting side to an objective side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a twelfth lens; wherein a numerical aperture is NA; a focal length of the microscope objective lens is f; an air spacing between the second lens and the third lens on an optical axis is d4; an optical total length of the microscope objective lens is TTL; a focal length of the twelfth lens is f12; a central radius of curvature of an emitting surface of the twelfth lens is R23; a central radius of curvature of an objective surface of the twelfth lens is R24, and the following relationship expressions are satisfied: 1.5 ≤ NA * f ≤ 3. ; 0.15 ≤ d 4 / TTL ≤ 0.25 ; 5. ≤ f 12 / f ≤ 15. ; - 7. ≤ ( R 23 + R 24 ) / ( R 23 - R 24 ) ≤ - 1.5 . 2 . The microscope objective lens of claim 1 , wherein a focal length of the eleventh lens is f11; a focal length of a combined lens formed by gluing the ninth lens and the tenth lens to each other is f9_10, and the following relationship expression is satisfied: 0.2 ≤ f 11 / f9_ 10 ≤ 0.9 . 3 . The microscope objective lens of claim 1 , wherein a distance from the objective surface of the twelfth lens to an objective surface of the microscope objective lens is WD, and the following relationship expression is satisfied: 2.3 ≤ WD / f ≤ 3.3 . 4 . The microscope objective lens of claim 1 , wherein an objective surface of the first lens is convex at a proximal-axis position; a focal length of the first lens is f1; a central radius of curvature of an emitting surface of the first lens is R1; a central radius of curvature of an objective surface of the first lens is R2; an on-axis thickness of the first lens is d1, and the following relationship expressions are satisfied: - 3.96 ≤ f 1 / f ≤ - 0.73 ; 0.34 ≤ ( R 1 + R 2 ) / ( R 1 - R 2 ) ≤ 1.78 ; 0. ≤ d 1 / TTL ≤ 0.06 . 5 . The microscope objective lens of claim 1 , wherein an emitting surface of the second lens is convex at a proximal-axis position, and an objective surface of the second lens is convex at a proximal-axis position; a focal length of the second lens is f2; a central radius of curvature of the emitting surface of the second lens is R3; a central radius of curvature of the objective surface of the second lens is R4; an on-axis thickness of the second lens is d3, and the following relationship expressions are satisfied: 1.1 ≤ f 2 / f ≤ 4.09 ;
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- What does patent US12585099B2 cover?
- The present application relates to the field of optical lenses and discloses a microscope objective lens. The microscope objective lens includes in order from the emitting side to the objective side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a twelfth lens, and the follo…
- Who is the assignee on this patent?
- Aac Optics Changzhou Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B21/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 24 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).