Cassegrain telescope design
E481876
The Cassegrain telescope design is a reflecting telescope configuration that uses a combination of a primary concave mirror and a secondary convex mirror to fold the optical path and produce a compact instrument with a long effective focal length.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Cassegrain reflecting telescope design | 1 |
| Cassegrain telescope design canonical | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
reflecting telescope configuration
ⓘ
telescope design ⓘ |
| hasAdvantage |
convenient eyepiece or instrument position at back of telescope
ⓘ
long focal length in compact form ⓘ short physical tube length ⓘ suitable for high magnification observations ⓘ |
| hasApplication |
astronomical observation
ⓘ
imaging systems ⓘ radio telescopes ⓘ space telescopes ⓘ spectroscopy ⓘ terrestrial observation ⓘ |
| hasDesignGoal |
improve instrument mounting convenience
ⓘ
provide long focal ratio ⓘ reduce telescope length ⓘ |
| hasFeature |
central obstruction by secondary mirror
ⓘ
hole in primary mirror for light exit ⓘ secondary mirror supported on spider or corrector plate ⓘ |
| hasFocalPlaneLocation | behind primary mirror ⓘ |
| hasHistoricalOrigin | 17th century ⓘ |
| hasLightPath | light reflects from primary to secondary to focal plane ⓘ |
| hasLimitation |
diffraction effects from central obstruction
ⓘ
more complex mirror fabrication than simple Newtonian ⓘ |
| hasOpticalConfiguration | two-mirror reflecting system ⓘ |
| hasOpticalPath | folded optical path ⓘ |
| hasPrimaryMirrorShape | concave ⓘ |
| hasPrimaryMirrorType | paraboloidal mirror ⓘ |
| hasProperty |
compact instrument form
ⓘ
long effective focal length ⓘ |
| hasSecondaryMirrorShape | convex ⓘ |
| hasSecondaryMirrorType | hyperboloidal mirror ⓘ |
| hasTypicalFocalRatioRange | f/10 to f/20 ⓘ |
| hasVariant |
Dall–Kirkham telescope
NERFINISHED
ⓘ
Maksutov–Cassegrain telescope NERFINISHED ⓘ Ritchey–Chrétien telescope NERFINISHED ⓘ Schmidt–Cassegrain telescope NERFINISHED ⓘ classical Cassegrain telescope ⓘ |
| isCommonIn | compact high-magnification telescopes ⓘ |
| isSubclassOf | catadioptric and reflecting telescope families via variants ⓘ |
| isUsedBy |
amateur astronomers
ⓘ
professional observatories ⓘ space agencies ⓘ |
| namedAfter | Laurent Cassegrain NERFINISHED ⓘ |
| supportsMounting |
cameras at Cassegrain focus
ⓘ
photometers at Cassegrain focus ⓘ spectrographs at Cassegrain focus ⓘ |
| uses |
primary concave mirror
ⓘ
secondary convex mirror ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Cassegrain reflecting telescope design