PW1000 Observatory System – (RC Optical Design)
Enjoy exceptional performance for astrophotography, research, or visual observing with the PW1000!
- f/6 and 6000mm focal length providing pinpoint stars across a 100mm image circle (1 degree).
- No coma, no off-axis astigmatism, and no field curvature.
- Compact Alt/Az design with dual Nasmyth ports allowing multiple instrumentation payloads to be installed on the telescope.
- Integrated direct drive field de-rotator / rotational field framing.
- Integrated direct drive mount with absolute encoders, zero periodic error, zero backlash, and minimal maintenance due to the lack of gears.
- Slew speeds up to 50 degrees/sec for satellite tracking and fast target acquisition.
- Optional 0.7x reducer for imaging at f/4.25 at 4,250mm focal length (part number 1000166)
- Fast 1 day installation and on-sky taking images that same night (weather dependent).
The PW1000 is a complete observatory class telescope and direct-drive alt-azimuth mounting system, designed and engineered by PlaneWave. With a 100 mm image circle, the PW1000 is designed to excel at imaging on large-format CCD cameras. The optical system utilizes a Nasmyth focus through both altitude bearings allowing your camera or eyepiece to remain at a fixed height while holding heavy instruments without needing to rebalance the optical tube assembly.
Instrumentation can be installed on both sides of the fork mount and easily accessed using the included rotating tertiary mirror system. With direct-drive motors, dual camera/eyepiece capabilities, high-resolution encoders, and zero backlash or periodic error, the PW1000 sets a new standard for 1-meter observatory telescopes.
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 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.
Alt-Az mounts are the choice for most modern professional observatories. 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 required to make a rigid Alt-Az mount is substantially less, leading to substantial cost savings. Unlike German Equatorial mounts, there are no meridian flips to deal with; you can image continuously from horizon to horizon if desired. With no polar alignment required, the Alt-Az mount is far more intuitive to use than a German Equatorial mount.
Proven Technology of the CDK700
The CDK (Corrected Dall-Kirkham) Optical Design is an innovative solution for unsurpassed scientific investigation, visual observing and astro-imaging at an affordable price. It has excellent performance with large format CCD cameras, far exceeding the off-axis performance of most commercial telescope designs, including the uncorrected Ritchey-Chrétien.
Our design produces a flat, coma-free and astigmatic-free field of view. Since the secondary mirror is spherical, centering is very forgiving, making it easy to align the telescope optics for optimum performance. The end result at the image plane is no off-axis coma, no off-axis astigmatism, and a perfectly flat field to the edge of a 100mm image circle. The stars will be pinpoints from the center to the corner of the field of view.
|Aperture||1000 mm (39.37 in.)|
|Focal Length||6,000 mm|
|Central Obstruction||47% of the Primary Mirror Diameter|
|Back Focus from De-rotator||373 mm (14.7 in.)|
|Weight||2600 lbs (1180 kg)|
|OTA Tube||Dual truss structure with Nasmyth focus ports|
|Optical Performance||3.7 micron RMS spots [35mm on-axis] (400 to 900nm) 5.0 micron RMS spots [50mm off-axis] (400 to 900nm)|
|Dimensions||135″ H x 72″ W x 45″|
|Focus Position||Dual Nasmyth Focus Ports|
|Optimal Field of View||100mm (1.0 degrees)|
|Image Scale||29 microns per arcsecond at F/6|
|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 and one on non-motor side)|
|Optical Tube||Dual truss structure with Nasmyth focus|
|Instrument Payload||300 lbs (150 ft-lbs) – mounted on the field de-rotator plate|
|Motor Control||Industrial grade Parker brushless motor control system and built in electronics|
|Motor – Azimuth and Altitude||Direct Drive 3 Phase Axial-Flux Torque Motor|
|Encoder – Azimuth and Altitude||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|
|Telescope Control Software||PlaneWave Interface 4 (PWI4) Software. Incorporates PointXP mount modeling software and All Sky PlateSolve, both by Dave Rowe. Also includes automatic focusing, dew heater control, primary mirror cover control, dome control and provides HTTP and ASCOM control interfaces. Linux and Windows compatible.|
|Pointing Accuracy||Better than 10 arcsecond RMS with PointXP Model|
< 1 arcsecond error over a 10-minute period
|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 arcseconds)|
|Radius of Curvature||6260 mm (246.46 inches)|
|Optical Diameter||1000 mm (39.4 inch)|
|Outer Diameter||1020 mm (40.157inch)|
|Core Diameter||360.7 mm (14.2 inches)|
|Primary Thickness||85 mm (3.3 inches)|
|Primary Weight||122 lbs. (54% light weighted)|
|Radius of curvature||5740 mm (226 inches)|
|Optical Diameter||450 mm (17.7 inches)|
|Secondary Weight||27.2 lbs|
|Optical Major Diameter||404 mm (15.9 inches)|
|Optical Minor Diameter||286 mm (11.3 inches)|
|M3 Thickness||65 mm (2.6 inches)|
NOTE: All specifications and dimensions are subject to change.
For warranty information please check our Standard Warranty Page
|Heating elements for dew prevention||The heating pads on the primary and secondary mirror require the 600195 Delta-T controller sold separately|
|OTA Cover||To protect the primary mirror and inside of the optical tube|
|Flashdrive||Contains software and instructions for collimation and spacing the primary to secondary mirror|
|Focuser and Derotator||Port one includes a focuser and derotator within PWI4|
|Feathertouch Focuser and Adapter||Used for visual observing through Port 2 with a user supplied eyepiece.|