Page 2 of 5 FirstFirst 1234 ... LastLast
Results 11 to 20 of 44
  1. #11
    jimt's Avatar
    jimt is offline Super Moderator
    Points: 37,302, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience PointsGot three Friends20+ Friends Achievement!5+ Referrals Achievement!
    Join Date
    Jul 2009
    Location
    North Georgia
    Posts
    5,716
    Points
    37,302
    Level
    100
    Thanks
    1,338
    Thanked 2,734x 1,769 Posts

    Default



    Hmm that thing wouldn't be too hard to adapt to be used as a finder either. First align your mirrors with it , the put it on the scope as a finder. A combo kit so to speak.

    Nice work

    Jim
    Celestron C9.25. Atlas EQG mount. Canon 500D unmodded, Celestron ST80 guide scope, SSAG, Meade 6.3 FR, Thousand Oaks dew control with Dewnot straps. Zhumell 8/24mm Zoom, 2"Gso Superview 42mm, Meade 2"QX wide angle 30MM, Meade 1.25 EP and filter set. Tasco 10x50 Zhumell 20x80 bino and a few other odds and ends.
    Now where did I put that clear sky button!

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  2. The Following User Says Thank You to jimt For This Useful Post:

    WWPierre (12-24-2010)

  3. #12
    pike40's Avatar
    pike40 is offline Bright Giants
    Points: 3,784, Level: 40
    Level completed: 90%, Points required for next Level: 16
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience Points400+ Posts Achievement365 Days+ Registered Achievement!
    Join Date
    Dec 2010
    Location
    Washington State
    Posts
    400
    Points
    3,784
    Level
    40
    Thanks
    63
    Thanked 109x 89 Posts

    Default

    Thanks for sharing this Pierre, very creative.

    Pike
    Zhumell Z8 Deluxe - Hyperion MarkIII Zoom Zhumell Plossl EP 32mm 30mm(2 inch) 12.5mm 9mm 6mm 4mm 2x
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    and an assortment of filters

    "I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road." - Stephen Hawking

  4. The Following User Says Thank You to pike40 For This Useful Post:

    WWPierre (12-24-2010)

  5. #13
    Canon Pete's Avatar
    Canon Pete is offline Moderator
    Points: 42,533, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    First 1000 Experience PointsGot three Friends365 Days+ Registered Achievement!200+ Posts Achievement!100+ Threads Achievement!
    Join Date
    Mar 2009
    Location
    Alba
    Posts
    6,249
    Points
    42,533
    Level
    100
    Thanks
    1,753
    Thanked 3,066x 1,997 Posts

    Default

    Pierre, I would likely take one from you with a GLP. I would of course pay shipping costs . Maybe you could PM details ?

    Clear Skies

    Pete
    ---------------------------------------------------

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    ---------------------------------------------------
    Cloud Dependant Astro Gear !!!
    10x50, 20x80 Bin's,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Canon EOS 600D, EOS 300D ( Baader ACF1 Modded
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    )
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    C80ED, C130 Reflector/EQ3 , Ep's 8mm - 24mm Hyperion Zoom, 40mm SP, 20mm Meade Pl, 10mm Pl , 9mm Meade Pl, Celestron 2x Ultima Barlows. SW Star Adventurer.

  6. The Following User Says Thank You to Canon Pete For This Useful Post:

    WWPierre (12-24-2010)

  7. #14
    WWPierre's Avatar
    WWPierre is offline HYPER GIANT
    Points: 64,445, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    10 Days registered3 Years + Achievement400+ Posts AchievementGhost Achievement! Averaging 5+ posts a day!1000 Days+ Registered Achievement!
    Join Date
    Jun 2009
    Location
    Squamish B.C.
    Posts
    6,948
    Points
    64,445
    Level
    100
    Thanks
    1,095
    Thanked 2,953x 1,808 Posts

    Default

    I'm doing a run of 10 now. I should have a price by the beginning of next week.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    We have been broadcasting our presence to the Universe for 100 years now. If there is a detachment of Galactic Pest Control within 100 light years, they are already on the way.

  8. #15
    Gordon Rayner's Avatar
    Gordon Rayner is offline White Dwarf
    Points: 1,176, Level: 19
    Level completed: 76%, Points required for next Level: 24
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Dec 2010
    Location
    California
    Posts
    10
    Points
    1,176
    Level
    19
    Thanks
    0
    Thanked 0x 0 Posts

    Default

    Very interesting, and timely for me, because a laserized binocular aligner has been under consideration in the binocular forum in Cloudy Nights. Perhaps one red laser, and one green laser, for left and right. After passing through the binocular, an achromatic lens of perhaps 20 to 30 inches focal length would project the beams onto a target screen .
    The hinge of the binocular must be parallel to the two beams .
    Have you considered two spring plungers (McMaster, Reid's, Vlier, Northwestern, etc. ) 90 deg apart, opposed by two adjusting setscrews?
    Or, eliminate the o-ring, and use two triplets ( one front, one rear)of : two spring plungers 120 deg. apart, opposed by one setscrew. The front and rear triplets would be 90 deg rotated from each other, for x-y motion of the beam, which could be made parallel to the tube axis. But without centration provided by the o-ring, some other way would be needed to make the beam and the tube coaxial, in addition to being mutually parallel.

    Coaxiality with parallelism would occur at one, and only one, setting of the rear adjusting screw and the front adjusting screw.

  9. #16
    WWPierre's Avatar
    WWPierre is offline HYPER GIANT
    Points: 64,445, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    10 Days registered3 Years + Achievement400+ Posts AchievementGhost Achievement! Averaging 5+ posts a day!1000 Days+ Registered Achievement!
    Join Date
    Jun 2009
    Location
    Squamish B.C.
    Posts
    6,948
    Points
    64,445
    Level
    100
    Thanks
    1,095
    Thanked 2,953x 1,808 Posts

    Default

    Hi Gordon, Welcome to our little corner of Cyberspace.

    I went over to CN but couldn't find the discussion. Perhaps you could direct me to it.

    I would certainly expect that the basic design could and would be improved upon. I was primarily interested in a design that could be easily produced with a minimum of resources.

    I like the idea of a 4 point adjustment, it would certainly make collimation easier.

    Eliminating the O-ring, however, would be, imo, a step backwards; it provides the initial coaxiality between the laser and the tube.

    The spring plungers would be perfect, and would certainly improve the design. Thank you for that insight. I didn't know what they were called, but when I googled them, I found them easily.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    We have been broadcasting our presence to the Universe for 100 years now. If there is a detachment of Galactic Pest Control within 100 light years, they are already on the way.

  10. #17
    Gordon Rayner's Avatar
    Gordon Rayner is offline White Dwarf
    Points: 1,176, Level: 19
    Level completed: 76%, Points required for next Level: 24
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Dec 2010
    Location
    California
    Posts
    10
    Points
    1,176
    Level
    19
    Thanks
    0
    Thanked 0x 0 Posts

    Default

    In CloudyNights, search in " Binoculars" with "laser aligner" or "laser collimator". I prefer to use "alignment" to describe the process of making rays from a distant target leaving the two eyepieces, and the hinge axis, mutually parallel.
    "Collimation" has been widely used to describe this process for binoculars, but it is best to reserve "collimation" to describe the process of correctly relating the components of a telescope.

    Slight departure from "collimation" in each of the two telescopes of a binocular may have been used used to obtain, in practical way, "alignment" of those two telescopes throughout( or over a portion of, or perhaps at only one , IPD) the human interpupillary (IPD)range of some 56 to 74 mm. That is one view.

    It has been stated, in CN by a Italian expert ( Claudio, as I recall) several years ago, that true 56-74 mm alignment necessarily means that each telescope has itself been "collimated". I do not recall if he included a geometric analysis of the situation. I recall that he included a proviso that this situation only applied to high quality binoculars.

    Today is my birthday. Newton was born on Xmas also, 300 years , to the day, before I came into the world. Others with the same anniversary include Humphrey Bogart and Clara Barton.
    Last edited by Gordon Rayner; 12-25-2010 at 10:49 PM.

  11. #18
    Gordon Rayner's Avatar
    Gordon Rayner is offline White Dwarf
    Points: 1,176, Level: 19
    Level completed: 76%, Points required for next Level: 24
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Dec 2010
    Location
    California
    Posts
    10
    Points
    1,176
    Level
    19
    Thanks
    0
    Thanked 0x 0 Posts

    Default

    The above search in CN will find the September "Re: bino collimate class " thread". There , I posted info from the Peter Abrahams binocular list blog. The man is Claudio Manetti <<claudiomanetti@virgilio.it>> . Bologna?

    Another source for spring plungers, and many other tooling and fixturing items, is CarrLane in St. Louis.
    Last edited by Gordon Rayner; 12-25-2010 at 10:50 PM.

  12. #19
    WWPierre's Avatar
    WWPierre is offline HYPER GIANT
    Points: 64,445, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    10 Days registered3 Years + Achievement400+ Posts AchievementGhost Achievement! Averaging 5+ posts a day!1000 Days+ Registered Achievement!
    Join Date
    Jun 2009
    Location
    Squamish B.C.
    Posts
    6,948
    Points
    64,445
    Level
    100
    Thanks
    1,095
    Thanked 2,953x 1,808 Posts

    Default

    Today is my birthday. Newton was born on Xmas also, 300 years , to the day, before I came into the world. Others with the same anniversary include Humphrey Bogart and Clara Barton.
    Very cool. I can only claim Hans Christian Anderson and Victor Borge, I believe.

    You have inspired the mechanical engineer in me, Sir. I am going to pick up a couple of square-head 1" bolts as soon as my supplier opens Monday, and switch the first run production to your two axis design. You have also led me to these which leads me to believe that these units could be produced cheaply enough to compete in the market as a tri=purpose instrument.

    I have even researched anodizing, Ron Newman, who makes Moonlite focusers, says it's pretty easy.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    We have been broadcasting our presence to the Universe for 100 years now. If there is a detachment of Galactic Pest Control within 100 light years, they are already on the way.

  13. #20
    Gordon Rayner's Avatar
    Gordon Rayner is offline White Dwarf
    Points: 1,176, Level: 19
    Level completed: 76%, Points required for next Level: 24
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Dec 2010
    Location
    California
    Posts
    10
    Points
    1,176
    Level
    19
    Thanks
    0
    Thanked 0x 0 Posts

    Default

    I did some anodizing in the 1970's, after reading the piece by Maurice King of Hawaii in one of the Maksutov Club circulars from Allan Mackintosh. A summary of my experiments appears in the mechanical volume of the highlights of the Mak Club circulars, available from Willmann-Bell. The King article is there also.

    The anodizing article by Mr. Newman, to which you have linked, has much more detail.

    The leading magazine for metal surface finishing and plating is Metal Finishing. Their 2010/11 Guidebook came last week. One could obtain the magazine by visiting a plating or anodizing shop, and asking them for one of the subcription tearouts included in the magazine and the guidebook. Or, call 1-800-765-7514. Outside the USA, 845-267-3490

    I acquired several Variacs and some transformers and autotransformers, and SCR s for rectification about 1980, with the intention of building a small setup for hardcoat anodizing, using proprietary additives and/or oxalic acid additives , to minimize hardcoating refrigeration . I wanted voltage variation for ordinary anodizing also. I had been using simple automotive 10 amp, 12 volt battery chargers. I still have the parts acquired then. I should like to sell them. They are heavy.

    Anodizing had become too much of a tail wagging the dog. Buckets, heaters, dye tanks take up space. I began to save up various parts, if time permitted, and let the professional shops do my anodizing and dyeing or hardcoat anodizing.

    As described in the Mackintosh edited book cited, I found the simple chromate conversion process to be adequate for most applications, the notable exception being threaded parts. Alodine, Iridite, Chroma-Coat, etc. can or could be bought for use on aluminum boats, airplanes, cars, etc., either as liquids or as powder for mixing your own solution. One might be able to buy some powder from a plater, as I did, and mix it with water. It gives iridescent coatings with a yellow tint. Attractive, and an ideal paint base .

    No current is required. Surface preparation is the same as for anodizing . I usually etch in warm or hot Drano solution (lye for plumbing clog cleanout), rinse, de-smut by immersion in (see the references , or Google it), rinse, dip in the Alodine etc. for a few seconds ( duration depends upon the final shade of yellow-gold wanted ), rinse, and air dry for a day or two. It prevents aluminum oxide from blackening the hands during intensive contact.


    But the main ingredient is hexavalent chromium, which is under intense environmental and health pressure, especially in California. ( It is not a hazard after forming Cr 2 O3 on the part's surface) It has been widely used since WW II. A newspaper article this week said that there is too much of it in the groundwater around San Jose. Research has been done to find a substitute, especially for aircraft maintenance and the electronics industry. One can read about trivalent chromium based sustitutes developed by the Navy, in the cited Guidebook, or Google it. Process parameter control is more exacting than with hexchrome conversion coatings. I have always been careful with my hexchrome . Gloves, splash goggles, do not breathe any dust from the powder when mixing, etc. I read somewhere that apricots, peaches, and probably other fruits require some chromium, but in which form, and in what concentration, I do not know. There formerly were many orchards(rather than apartments and freeways and industry) around San Jose, before Silicon Valley. If they had been in the same period, perhaps symbiosis via the groundwater? I suppose that it is found in vitamin supplements, in small amounts. I am certain that I would not want to work in a bumper plating shop.

    Chromic acid anodizing is superior to sulfuric acid anodizing for salt water spray subjected parts. I know this from years of personal comparison of sulfuric anodized accessories I made and sold for salt water spray exposed Fuji 25 x 150 binoculars, versus the chromic acid anodized binocular bodies. Their ads described the superiority of chromic acid anodizing , in Japanese English.
    Last edited by WWPierre; 12-27-2010 at 02:11 AM.

 

 
Page 2 of 5 FirstFirst 1234 ... LastLast

Similar Threads

  1. Laser Collimator vs. Barlowed Laser Collimator
    By TheDutchman1979 in forum Telescope Accessories Forum
    Replies: 4
    Last Post: 09-01-2009, 09:52 PM
  2. Laser Collimator
    By Eric in forum General Astronomy Forum
    Replies: 0
    Last Post: 05-01-2004, 06:26 PM
  3. Best laser collimator
    By James Horn in forum Amateur Astronomy Forum
    Replies: 0
    Last Post: 07-11-2003, 07:32 PM
  4. Best laser collimator
    By Jim Cate in forum Amateur Astronomy Forum
    Replies: 2
    Last Post: 07-11-2003, 12:59 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 10:10 PM.