LISTSERV - TECHNET Archives - LISTSERV.IPC.ORG

TECHNET Archives

November 2003

TechNet@IPC.ORG

	LISTSERV Archives
	TECHNET Home
	TECHNET November 2003

	Log In
	Register

	Subscribe or Unsubscribe

	Search Archives

Options:	Use Monospaced Font Show Text Part by Default Show All Mail Headers
Message:	[<< First] [< Prev] [Next >] [Last >>]
Topic:	[<< First] [< Prev] [Next >] [Last >>]
Author:	[<< First] [< Prev] [Next >] [Last >>]

Subject:	Re: 4X magnification
From:	"Sauer, Steven T." <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 28 Nov 2003 07:10:38 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (54 lines)

Good Morning Sheila,
To understand more about visual optics and microscopes you can follow the
attahced link (http://www.azmackes.net/astronomy/mil_hdbk_141/)
and look at chapters 4 and 23 of MIL-HDBK-141.
This document was cancelled without replacent in 1986 and is not available
on the DOD Assist website.
Good Luck.

Steve Sauer
NG, Xetron
Cincinnati, OH

-----Original Message-----
From: Sheila Akins [mailto:[log in to unmask]]
Sent: Thursday, November 27, 2003 6:22 AM
To: [log in to unmask]
Subject: [TN] 4X magnification


Technetters,
Under the Visual Examination para in IPC-600, IPC-6012, & IPC-6013 reference
is made to "1.75x magnification (approx. 3 diopters)". Do any IPC or other
Internationally recognized standards list the formula for determining
magnification or a table of magnification vs. diopter? When I talked to my
vendors and distributors about this topic almost all of them had a different
theory and or method for calculating magnification.

Under the Visual Examination para in IPC-610, as the size of the feature
being inspected is reduced in size, the magnification increases. One of the
magnification powers called out is 4X. Our stereo-microscopes start at 7X or
10X and we do not want to use pocket comparators or jewelers eye loops to
perform inspection operations. Does anyone know where 4X halo lamps can be
purchased?

Does anyone know of a way to confirm the magnification of a standard Halo
lamp?

Vendor references can be sent to
[log in to unmask]

Any and all assitance with this issue is greatly appreciated.

Sheila Akins

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------

ATOM RSS1 RSS2

LISTSERV.IPC.ORG