With more then 40 years of experience, we are your source for ultra narrow optical filters for observing the sun, ranging from the professional to the amateur alike. H alpha solar is only one of the many wavelengths we provide.
With the new higher current TEC's in a smaller footprint, we are now able to offer a TEC model using a tiltable housing
When it come to tilt tuning, the best Hw is the medium range. The Suna will have a Hw of .65Ang +/-.1 Ang. This is idea for the disk and prominences.
The Suna is ideal for the amateur looking to get into solar Ha on a budget.
The perfect match, the new SunDancer II 3X achromatic telecentric from Baader Planetarium and the Suna. With it's small design and 60-180mm back focus it makes a very compact system.
The new K-line filters with HW's from 1 Ang to less then .5 Ang. Made possible by the use of newly designed Hard Coated, high transmitting blockers. At an affordable price.
Narrow or ultra narrow bandpass filters of different designs from 380nm to 900nm.
For the detection of lightning at 774nm, filters of 140mm diameter on Sapphire substrats, with HW's as narrow as 1nm can be supplied in a 3 cavity design.
TEC controlled ovens offer the most stable way to control the filters wavelength.
This is achieved by either using a analog TEC chip controller ( requires less power) or an digital temperature controller design for controlling TEC's
Tiltable ovens are good for quick Doppler tuning and general us. The temperature is controlled by a digital temperature controller
To achieve better control of the filter's wavelength, standard ovens can be converted to a TEC controlled system
Powder coated spun covers in a wide range of sizes, ranging from Tak60 to C-14 or larger if needed
Cells for most common ERF's
Custom ERF cells are available from 50mm and up
The Research Grade filters with their high uniformity will meet the requirements of the serious researcher. They are offered in a 18mm .3Ang+.1/-.05Ang
32mm or 46mm CA. These filters come in Hw of .65Ang+/-.1Ang, .5Ang+.1/-.05Ang and .3Ang+.1/-.05Ang
The Advanced Solar Observers (ASO) are high quality bandpass filters for the advanced amateur or college level observer. They have a 32mm CA and are mounted in a precision thermoelectric controlled oven. These filters come in Hw of .5Ang+.1/-.05Ang and .3Ang+.1/-.05Ang
The Solar Observer series (SO-1.5) are narrow band solar filters with the amateur solar astronomer in mind.
The SO-1.5 has a 25mm CA. These filters also come with Hw of .5Ang+.1/-.05Ang and .3Ang +.1/-.05Ang
The Suna series is a tiltable temperature controlled oven. They are a 25mm or 32mm CA filter. The Suna is a versatile system with a HW common with other brands of Ha filters on the market. The tilting allows quick wavelength changes for Doppler observing. They come in Hw of .65Ang+/-.1Ang,
The B-1 SR is the standard controller for the RG and ASO ovens. It will control the oven's set point to within .1C. It operates on 12 volt DC power. It also can be used with the SO series. It provides either 12volt dc or 6.2volt dc depending on the required output voltage
The B-3 controller is used with the Suna and SO-1.5 filter series. It operates on 12 volt dc.
The 120 volt version can replace the outdated controller of a standard Daystar ATM(t/a) round oven.
The Analog TEC controller is based on a custom designed TEC controler chip. It can be used with the Suna series or any TEC conversion. It is normaly used when the temperature setpoint is 30C or lower. It can be designed to operate with either a 5 volt or 12 volt dc input. It has a 4 or 6 amp 5 volt output depending on the control chip used.
Filters in the blue end of the spectrum are less sensitive to temperature. They can be mounted either in a tiltable or TEC oven depending on the customer's needs. They are offered in 25mm, 32mm and 46mm CA. We can provide HW's from 1 Ang to less then .5Ang at this wavelength.
To take advantage of the Na lines, the bandpass needs to be narrow. Filters with .5Ang Hw would be the maximum. They really need to be in the .3Ang range to take full advantage of the line. With this narrow Hw the TEC controlled oven is required. They are offered in 25mm, 32mm, and 46mm CA.
Standard thin ovens are used for narrow, soft coated bandpass filters. These work well for optical filters where there is no external energy that will move them off band.
The standard strip heater's disadvantage is that the extra energy coming from the solar image will move the bandpass off band. The controller's set point only knows to turn off. With a TEC control, the controller can either heat or cool to maintain the correct temperature to hold the bandpass wavelength where you want it to be.
We can provide both collimated or telecentric designs and units for your custom needs.
We also offer standard telecentrics for most common telescopes.
The mounting plates are standarized to fit all the model of filters you choose. Most plates are double threaded for more possible combinations.
Custom mounting can be made as needed.
These tubes are for 1 1/4" and 2" eye pieces. They come with different threads to match your mounting plate's threads.
These are designed to replace extension tubes that are normaly used with telecentrics.
Any custom tube that you may need
Over time filters using soft coated blockers will degrade. They can be replaced with the same design or a new design at a reasonable cost
Your needs for special sized ovens from 80mm to 12mm CA. With controllers that will interface with your system
Tel: 520 292 5010
Contact: Baader Planetarium GmbH for the nearest repesentative near you.
Tel: 49/814 580 890