DGM Optics OA-6.5 ATS Kullanım ve Bakım Kılavuzu - Sayfa 3

Teleskop DGM Optics OA-6.5 ATS için çevrimiçi göz atın veya pdf Kullanım ve Bakım Kılavuzu indirin. DGM Optics OA-6.5 ATS 7 sayfaları. Oa-series

Last Updated 8 August 2000

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The OA -Series™ telescopes secondary mirrors are permanently mounted and

aligned prior to shipment and rarely require anything more than to be checked

prior to aligning the primary. Here is the procedure. First, you will notice that a

small indelible ink mark has been placed in the center of the primary mirror. This

mark provides a visual reference to the center of the primary when aligning the

secondary mirror. Using an empty film can, with a ¼ inch hole drilled in the

center and placed in the barrel of the focuser, the mark on the primary mirror

should be centered when viewed with your eye on top of the film can. Next

remove the film can and with your eye remaining centered over the barrel of the

focuser move your eye back to approximately 6 inches away. Repeat this step at

distances of 12, then 18, then 24 inches. At each step the secondary should

appear concentric and centered with regard to the barrel of the focuser with your

eye remaining centered on the optical axis as you move farther from the focuser

barrel. If it appears that the secondary is not in correct alignment you can

manipulate the secondary by carefully bending the secondary on the brass rod

that attaches the secondary to the "L" stalk the supports the whole assembly to

the interior of the tube. If you cannot achieve a satisfactory alignment contact

DGM Optics™ and I will be happy to assist you. If your secondary mirror appears

to be in correct alignment you can proceed to "part B" of the alignment.

Alignment Part B: The Primary

Next comes the easy part: the primary. To provide a constant reference, the

primary mirror alignment should be done with the scope pointing on the

horizontal looking at a white background. Looking into barrel of the focuser, with

no eyepiece, and your eye centered over the barrel of the focuser, you should

see only the primary with no image of the secondary visible. Next, if you have a

standard OA -Series™ scope (OA-4.0™ ™ , OA-5.5™ ™ , or OA-7.0™ ™ ), move your eye

slightly towards the rear of the scope, (the six o'clock position if the front of your

scope is twelve o'clock). If the instrument is correct in alignment you should see

a small "sliver" of the secondary mirror at the twelve o'clock position on the

primary mirror. The key to aligning an off-axis Newtonian telescope is in the fact

that primary is actually a segment taken from a larger "parent mirror" and it is

beneficial to think of it in that way. When looking into the focuser barrel, think of

an imaginary "center line" running through the primary from twelve o'clock to

the six o'clock position on the primary. This imaginary line runs from the thickest

to the thinnest part of the primary and it also points back to the center (apex) of

the old "parent mirror". If the alignment appears incorrect, use any needed

combination of the primary mirror cell adjusters to bring the image of the

secondary mirror to the correct position on the "center line". The procedure for

the ATS scopes (OA-5.1 ATS™ ™ , OA-6.5 ATS™ ™ , and OA-9.0™ ™ ) is different only

in that the "sliver" of the secondary will be at the six o'clock position, instead of

the twelve o'clock position. Other than that the procedure is the same.

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