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2. Diaphragm (optics) - Wikipedia

   en.wikipedia.org/wiki/Diaphragm_(optics)

   Nine-blade iris Pentacon 2.8/135 lens with 15-blade iris Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades In the human eye, the iris (light brown) acts as the diaphragm and continuously constricts and dilates its aperture (the pupil) A 750nm titanium-sapphire laser beam passing through an iris diaphragm, while opening and closing the iris.

3. 10 Things To Know Before Using Costco Optical - AOL

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   Many online sources report that the average cost of lenses and frames at Costco Optical is around $185, which is lower than what VisionCenter.org notes is the average price range for new glasses ...

4. The 7 Best Sale Items at Costco Right Now - AOL

   www.aol.com/7-costco-deals-dont-want-221402742.html

   The 7 Best Sale Items at Costco Right Now. Camryn Alexa Wimberly. November 21, 2024 at 5:14 PM. Read on to find out the best deals to take advantage of. Eating Well/Getty Images.

5. Condenser (optics) - Wikipedia

   en.wikipedia.org/wiki/Condenser_(optics)

   Condensers typically consist of a variable-aperture diaphragm and one or more lenses. Light from the illumination source of the microscope passes through the diaphragm and is focused by the lens(es) onto the specimen. After passing through the specimen the light diverges into an inverted cone to fill the front lens of the objective.

6. 8 Costco Sale Items To Buy Before They Sell Out This March - AOL

   www.aol.com/finance/8-costco-sale-items-buy...

   “Fortunately, Costco is discounting this bulk buy of Kleenex this month by $5, dropping the price to $19.99 and the unit price to 2 cents per tissue.” As with many of these bulk sales, Costco ...

7. Bright-field microscopy - Wikipedia

   en.wikipedia.org/wiki/Bright-field_microscopy

   A bright-field microscope has many important parts including; the condenser, the objective lens, the ocular lens, the diaphragm, and the aperture. Some other pieces of the microscope that are commonly known are the arm, the head, the illuminator, the base, the stage, the adjusters, and the brightness adjuster.