Julie Bentley Books

Field guide to lens design

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The process of designing lenses is both an art and a science. While advancements in the field over the past two centuries have done much to transform it from the former category to the latter, much...

Field guide to lens design

By Julie Bentley

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Developing Oracy

By Lorna Dunstan, Julie Bentley

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Optical Design and Testing IV

By Chunlei Du, Kimio Tatsuno, Yongtian Wang, Hendrik Urbach, Julie Bentley

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Optifab 2017

By Julie Bentley

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Optifab 2015

By Julie Bentley

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.