CN2304138Y - Astronomical telescope - Google Patents
Astronomical telescope Download PDFInfo
- Publication number
- CN2304138Y CN2304138Y CN 97227110 CN97227110U CN2304138Y CN 2304138 Y CN2304138 Y CN 2304138Y CN 97227110 CN97227110 CN 97227110 CN 97227110 U CN97227110 U CN 97227110U CN 2304138 Y CN2304138 Y CN 2304138Y
- Authority
- CN
- China
- Prior art keywords
- telescope
- astronomical
- astronomical telescope
- lens barrel
- sphere
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Lenses (AREA)
Abstract
The utility model relates to an astronomical telescope. Because a mouth part of a telescope barrel is provided with an incident light diaphragm, an entrance pupil is moved on to incident light diaphragm of a focal point in front of a spherical face primary telescope from a side opening of a reflection surface of the spherical face primary telescope. Compared with the classical type Newton-type astronomical telescope with the spherical face primary telescope, the telescope has obviously reduced aberration of image beams outside a shaft, and greatly improved image quality. The astronomical telescope has the advantages of light and handy structure and convenient use, being suitable for the observation requirement of astronomical popular science.
Description
The utility model relates to a kind of astronomical telescope, belongs to single simple autocollimator.It comprises structures such as eyepiece, object lens, secondary mirror.
The structure of classic primary mirror sphere Newtonian astronomical telescope is to establish primary mirror sphere in mirror letter bottom, and the lens barrel oral area is established secondary mirror support and secondary mirror, also is provided with eyepiece on lens barrel mouth outer wall.Because this telescopical entrance pupil is positioned on the reflecting surface limit mouth of primary mirror, the imaging of its primary mirror sphere fails to bring into play the exclusive centre of sphere symmetry of spherical mirror, thus its off-axis aberration greatly, to resemble matter relatively poor.
The purpose of this utility model provides a kind of to classic primary mirror sphere Newtonian telescope improved telescope in addition.This telescope increases an incident diaphragm at its lens barrel oral area, and respective change has also been done in the position of entrance pupil, and therefore, the telescopical matter that resembles is greatly improved.
The purpose of this utility model is realized by following structure: from astronomical telescope lens barrel 1 oral area to lens barrel 1 bottom incident diaphragm 2, secondary mirror support 3, plane secondary mirror 4 and primary mirror sphere 5 are installed successively, incident diaphragm 2 is positioned at the front focus place of primary mirror sphere 5, leave one section space 6 between incident diaphragm 2 and lens barrel 1 openend, place the incident diaphragm 2 or the filter of different bores when being convenient to observe.The bore of primary mirror sphere 5 is greater than the diameter of incident diaphragm 2.
Effect of the present utility model and advantage are: move to the entrance pupil of primary mirror sphere Newtonian telescope on the circular hole incident diaphragm 2 of primary mirror front focus from primary mirror reflecting surface limit mouth, the circular hole bore equals telescopical incident bore, and the bore of primary mirror sphere 5 is greater than the bore of incident diaphragm 2.So, just constitute the side's of elephant telecentric beam path structure.The classic primary mirror sphere Newtonian telescope identical with incident bore, luminous power and visual field compared, and the wave aberration of the outer imaging light beam of this axis of no-feathering will reduce about 50%, therefore resembles matter and greatly improves.Simultaneously, lens barrel 1 diameter and length dimension are suitable with the former.Because of being the side's of elephant telecentric beam path structure, the chief ray of the outer different angle incident beam of axle all is parallel to optical axis at image space, so to resemble the center of spot constant at its relative position of front and back, focal plane in each zone in the visual field.When the footpath, angle of measuring celestial body in the visual field with micrometer eyepiece or angular distance, the dividing plane that had both made eyepiece can not influence measuring accuracy with strict the coincidence yet in telescopical focal plane, and this has vital role for the unreal measuring error that causes of focusing that overcomes because of due to a variety of causes.
Accompanying drawing is explained:
Accompanying drawing 1 is the astronomical telescope elevation cross-sectional view.
Accompanying drawing 2 is looked (partial cutaway) figure for an astronomical telescope left side.
Embodiment:
As shown in Figure 1, from astronomical telescope lens barrel oral area to lens barrel 1 bottom incident diaphragm 2, secondary mirror support 3, plane secondary mirror 4 and primary mirror sphere 5 are installed successively, leave one section space 6 between incident diaphragm 2 and lens barrel 1 openend, place the incident diaphragm or the filter of different bores when being convenient to observe.As shown in Figure 1 and Figure 2, the bore of primary mirror sphere 5 is greater than the diameter of focus incident diaphragm 2.Eyepiece is established in outer wall and plane secondary mirror 4 corresponding positions at lens barrel 1.
Claims (2)
1, a kind of astronomical telescope, comprise structures such as eyepiece, object lens, secondary mirror, it is characterized in that incident diaphragm 2, secondary mirror support 3, plane secondary mirror 4 and primary mirror sphere 5 being installed successively from lens barrel 1 oral area to lens barrel 1 bottom, incident diaphragm 2 is positioned at the front focus place of primary mirror sphere 5, leaves one section space 6 between incident diaphragm 2 and lens barrel 1 openend.
2, astronomical telescope according to claim 1 is characterized in that the diameter of the bore of primary mirror sphere 5 greater than incident diaphragm 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97227110 CN2304138Y (en) | 1997-09-24 | 1997-09-24 | Astronomical telescope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97227110 CN2304138Y (en) | 1997-09-24 | 1997-09-24 | Astronomical telescope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2304138Y true CN2304138Y (en) | 1999-01-13 |
Family
ID=33940628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97227110 Expired - Fee Related CN2304138Y (en) | 1997-09-24 | 1997-09-24 | Astronomical telescope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2304138Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242391A (en) * | 2015-10-29 | 2016-01-13 | 河南师范大学 | Reflection type telescope with near-zero shading |
-
1997
- 1997-09-24 CN CN 97227110 patent/CN2304138Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242391A (en) * | 2015-10-29 | 2016-01-13 | 河南师范大学 | Reflection type telescope with near-zero shading |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |