Astronomy Specialist

PLANEWAVE PW1000 OBSERVATORY SYSTEM

$780,000.00

 

Prices do not include shipping costs. Contact us for exact shipping prices before purchasing. 

The PW1000 is a complete 1-meter observatory-class telescope featuring a direct drive altitude-azimuth (Alt-Az) mounting system designed and engineered by PlaneWave. With a diffraction-limited 100mm image circle, the PW1000 is designed to excel at imaging on the largest format CCD cameras available today.

Light-weighted optics are made of zero expansion fused silica materials for excellent thermal stability and maximum throughput. The dual Nasmyth ports allow two instruments to be installed simultaneously, and a computer-controlled M3 mirror allows either instrument to be remotely selected in seconds. With direct-drive motors, high-resolution encoders, zero-backlash and no periodic error, the PW1000 sets a new standard in 1-meter class observatory telescopes. 

 

PW1000 Features

  • Pinpoint stars out to a 100mm image circle
  • Ultra-low thermal expansion fused silica optics
  • Dual Nasmyth focus, allowing simultaneous mounting of two instruments or easy switching between visual and imaging use
  • Direct-drive motors on each axis for smooth, fast, and virtually silent movement of the telescope
  • High resolution encoders on each axis for precise positioning
  • Zero backlash
  • Zero periodic error
  • PointXP mount modelling software
  • Field de-rotator / rotational field framing

 

An alt/az mount is inherently more stable than an equatorial mount since there is no cantilevered mass, nor are there any large protruding counterweights to create a dangerous hazard in a public observatory. An alt/az telescope is also considerably more compact than its equatorial counterpart, allowing a larger telescope to fit in a smaller enclosure. The mass it takes to make a rigid alt/az mount is substantially less, leading to cost savings.


Benefits of Nasmyth focus

The Nasmyth Focus is along the altitude axis so there are virtually no balancing issue as you change out equipment. Eyepieces remain at a constant wheelchair-accessible height, greatly simplifying access to the telescope for public observatories. The rotating tertiary mirror allows you to switch from one Nasmyth port to the other in just seconds, allowing observers to easily transition between imaging and visual use.

Rotating tertiary mirror

The PW1000 includes an integrated rotator for the tertiary mirror, with magnetic locks to position the mirror precisely for either Nasmyth focus position. The rotator can move from one port to the other in under 10 seconds.

Direct drive motors and encoders

Direct Drive motors mean that there are no gears to cause backlash and periodic error. With high-resolution encoders providing the feedback for the direct drive motors, not only will the telescope track without periodic error or have any backlash at all, but the mount will be able to counter against wind gusts. The direct drive motors can move the telescope at incredible speeds for tracking satellites or just to minimize target acquisition time.

Automated primary mirror shutter

Protects the primary mirror from unwanted dust and moisture with integrated four shutter automated system, fully controllable with PlaneWave’s PWI software.

 

Optical system

Aperture 1000 mm (39.37")
Focal length
6000 mm
Focal ratio
f/6
Central obstruction
47% of the primary mirror diameter
Backfocus from mounting surface
370 mm
Optical performance (400-900 nm)
3.7μ RMS at 35 mm on-axis; 5.0μ RMS at 50 mm off-axis
Image scale
29μ per arcsecond at f/6
Optimal field of view 100 mm image circle (1.0 degrees)
Construction
Dual truss structure with Nasmyth focus
Weight 1180 kg
Dimensions 135″ H x 72″ W x 45″ D


Primary mirror

Optical diameter
1000 mm
Outer diameter 1020 mm
Material
Fused silica (quartz)
Core diameter
360.7 mm
Edge thickness
85 mm
Weight
55.4 kg
Radius of curvature 6260 mm

 

Secondary mirror

Optical diameter
450 mm
Material
Fused silica (quartz)
Weight
12.34 kg
Radius of curvature 2961 mm

 

Tertiary mirror

Optical major diameter
404 mm
Optical minor diameter
286 mm
Material
Fused silica (quartz)
M3 thickness 65 mm

 

Mechanical structure

Fork assembly
Space frame steel truss
Fork base Welded stainless steel torsion box
Azimuth bearing
Dual 11.125 inch tapered roller bearings
Altitude bearing
Three 9.5 inch 4 way loaded ball bearings (two pre-loaded on motor side, one on non motor side)
Optical tube
Dual truss structure with Nasmyth focus
Instrument payload 136 kg (68 kg mounted on the field de-rotator plate)

 

Motion control

Motor control
Industrial grade Parker brushless motor control system and built in electronics
Motors
Direct Drive 3 Phase Axial-Flux Torque Motors
Encoders
Absolute encoder with a resolution of 0.005 arcseconds (268 million counts per revolution)
Motor torque
Greater than 200 ft-lbs of peak torque
Drive electronics
Controls the altitude and azimuth motors and encoders, 2 direct drive de-rotators with absolute encoders, 4 fans zones, 3 dew heater zones, two focusers, an array of temperature sensors, M3 port selector, primary mirror covers and magnetic axis deceleration
Control software Incorporates PointXP mount modelling software by Dave Rowe All ASCOM compatible.

 

System performance

Pointing accuracy Better than 10 arcsecond RMS with PointXP Model
Pointing precision
2 arcsecond at sidereal velocity
Tracking accuracy
<1 arcsecond error over 10 minute period at sidereal velocity
System natural frequency
10 Hz or greater
Field de-rotator accuracy
3 microns of peak to peak error at 35mm off-axis over 1 hour of tracking (18 arcsec)


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