Inverted microscope
View Patent ↗Provided is an inverted microscope 1 comprising an objective optical system 2 that collects light from a specimen A; an image-forming optical system 3 that images the light from the specimen A that has been collected by the objective optical system 2 to form an intermediate image; a relay optical system 6 that relays the intermediate image B of the specimen A formed by the image-forming optical system 3 ; a binocular lens barrel 5 that splits the light from the relay optical system 6 ; a pair of ocular optical systems 4 that image, in a magnified manner, the intermediate images that have been split by the binocular lens barrel 5 on eyes E of an observer as virtual images; wherein the following conditional expressions are satisfied: K =( Fntl/Ftl )×β RL (1), Fne=Fe×K (2), and 0.3< K <0.9 (3).
1. An inverted microscope comprising:
an objective optical system that collects light from a specimen;
an image-forming optical system that images the light from the specimen that has been collected by the objective optical system to form an intermediate image;
a relay optical system that relays the intermediate image formed by the image-forming optical system;
an light-splitting unit that splits the light from the relay optical system; and
a pair of ocular optical systems that image, in a magnified manner, the intermediate images that have been split by the light-splitting unit on eyes of an observer as virtual images;
wherein the following conditional expressions are satisfied:
K =( Fntl/Ftl )×β RL (1),
Fne=Fe×K (2), and
0.3 <K< 0.9 (3),
wherein
K is a coefficient;
Fntl is a focal length of the image-forming optical system;
Ftl is a focal length of a reference image-forming optical system having a magnification of 1×;
βRL is a magnification of the relay optical system;
Fne is a focal length of the ocular optical system; and
Fe is a focal length of the ocular optical system in an inverted microscope including the reference image-forming optical system and a reference objective optical system.
2. An inverted microscope according to claim 1 , satisfying the following conditional expression:
15 <FN< 22 (4);
wherein FN is a field number of the ocular optical system.
3. An inverted microscope according to claim 1 , satisfying the following conditional expression:
0.45 <K (5).
4. An inverted microscope according to claim 2 , satisfying the following conditional expression:
0.45 <K (5).
5. An inverted microscope according to claim 1 , satisfying the following conditional expressions:
140 <Fntl< 210 (6),
0.55 <βRL< 1.1 (7), and
8 <Fne< 23 (8).
6. An inverted microscope according to claim 2 , satisfying the following conditional expressions:
140 <Fntl< 210 (6),
0.55 <βRL< 1.1 (7), and
8 <Fne< 23 (8).
7. An inverted microscope according to claim 3 , satisfying the following conditional expressions:
140 <Fntl< 210 (6),
0.55 <βRL< 1.1 (7), and
8 <Fne< 23 (8).