CN2586179Y

CN2586179Y - Micro-telescope

Info

Publication number: CN2586179Y
Application number: CN 02264565
Authority: CN
Inventors: 潘舒伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-19
Filing date: 2002-09-19
Publication date: 2003-11-12
Anticipated expiration: 2012-09-19

Abstract

The utility model relates to a micro-telescope. The utility model is characterized in that the same primary optical axis is provided with three sets of convex lenses capable of imaging for three times; the convex lenses are an objective lens, a front eye lens and a back eye lens, wherein, the convex lens which forms a first inverted decreased real image in a position outside of a focus of the front eye lens is the objective lens, and the convex lens which forms the first inverted real image into a second upright real image in a position of a focus of the back eye lens is the eye lens. The utility model has higher magnification under the condition of the same length; the length at 30 times is about 40 cm through an experiment. The utility model does not need to be provided with inverted image devices, such as a prism, and can realize continuous magnification changes; the utility model has the advantages of simple structure and light weight.

Description

Micro-telescope

Technical field:

The utility model relates to telescope.

Background technology:

At present, the telescope that people use roughly has two kinds, a kind ofly is made of convex lens and concavees lens; Another kind is made of two convex lens.Though the former is simple in structure, the possibility that multiplying power increases again is less, and length is also bigger.Though the potentiality that latter's multiplying power increases are bigger,, the image that people observe by it stands upside down, and therefore, needs one or one group of total reflection prism that image is just come simultaneously, and this has increased telescopical weight simultaneously.

Summary of the invention:

Technical problem to be solved in the utility model is to avoid existing weak point in the above-mentioned prior art, and the higher micro-telescope of multiplying power under a kind of same length is provided.

The technical scheme that the utility model technical solution problem is adopted is:

The design feature that the utility model is used be on same primary optical axis, be provided with can three imagings three groups of convex lens, described convex lens are object lens, preceding eyepiece and back eyepiece, wherein, the convex lens of real image first position beyond the focus of preceding eyepiece that one-tenth handstand is dwindled are object lens, and it is eyepiece that described inverted real image first is imaged as the convex lens of upright real image second in back eyepiece focus place.

The utility model is to have constituted a microscope with its preceding eyepiece and back eyepiece, promptly observes distant objects by the object lens imaging with microscope.Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model has shortened optical tube length under the constant situation of brightness, multiple.Also promptly under the situation of equal length, multiplying power is higher.Through actual measurement, the focal length of object lens is 15.5cm, and preceding eyepiece focal length is 1.8cm, and back eyepiece focal length also is 1.8cm, and times magnification is when being 30 times, and length is about about 40cm.

2, the utility model need not to be provided with the inverted image device of prism and so on, and is simple in structure, in light weight.

3, the utility model can be realized continuous zoom by adjusting the distance between each convex lens.

The drawing explanation:

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model image-forming principle synoptic diagram.

Embodiment:

Referring to Fig. 1, Fig. 2, adopt three imagings on same smooth main shaft of three groups of convex lens, described convex lens comprise object lens 1, preceding eyepiece 2 and back eyepiece 3, close mutual position: real image first 4 position beyond preceding eyepiece 2 focuses that object lens stand upside down for 1 one-tenth and dwindle, described real image first 4 through 2 one-tenth upright real image second 5 of preceding eyepiece in after the focus place of eyepiece 3

As shown in Figure 1, convex lens independently are provided with lens barrel separately, comprise lens barrel 6, preceding eyepiece lens barrel 7 and back eyepiece lens barrel 8.Adopt adjustable being threaded of distance between each lens barrel.

Image-forming principle as shown in Figure 2, object becomes the little positive real image first 4 of retraction through object lens 1 in focus the place ahead of preceding eyepiece 2, real image first 4 is amplified the real image second 5 of (for the real image first) at the focus place upright (with respect to for the object) of back eyepiece 3 by preceding eyepiece 2, real image second 5 becomes the upright virtual image at the focus place of back eyepiece 3, is the observed object of human eye.

Distance before regulating between eyepiece 2 and the back eyepiece 3 can change its multiple.When distance was big more, real image second 5 was just big more, and the virtual image that it became is also just big more; Instead greatly then more little.To focus again after becoming doubly, be in the focus place of back eyepiece 3 all the time to guarantee real image second 5.

Claims

1, a kind of micro-telescope, it is characterized in that on same primary optical axis being provided with can three imagings three groups of convex lens, described convex lens are object lens (1), preceding eyepiece (2) and back eyepiece (3), wherein, the convex lens of real image first (4) position beyond the focus of preceding eyepiece (2) that one-tenth handstand is dwindled are object lens (1), and it is eyepiece (2) that described inverted real image first (4) is imaged as the convex lens of upright real image second (5) in eyepiece (3) focus place, back.

2, micro-telescope according to claim 1 is characterized in that described convex lens independently are provided with lens barrel separately, comprises lens barrel (6), preceding eyepiece lens barrel (7) and back eyepiece lens barrel (8), adopts adjustable being threaded of distance between the lens barrel.