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<title><![CDATA[EC21 Product Catalogs - concave]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/concave--271303/1/concave.html]]></link><item>
<title><![CDATA[Optical Spherical Concave Reflective Mirror]]></title><link><![CDATA[https://ruiqioptics.en.ec21.com/Optical_Spherical_Concave_Reflective_Mirror--11974301_12019800.html]]></link><description><![CDATA[concave mirror, cylindrical mirror, elliptical mirror, right angle prism mirror, Hot mirror, cold mirror, Flat mirror etc, many of stock size for choosing, select a coating appropriate to your applic]]></description><pubDate><![CDATA[20241022]]></pubDate></item>
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<title><![CDATA[Double Concave Lens]]></title><link><![CDATA[https://hsgdoptic.en.ec21.com/Double_Concave_Lens--12004331_12019606.html]]></link><description><![CDATA[https://www.hsgd-optics.com/optical-spherical-lens/double-concave-lens.html
Double Concave Lens
Double concave lens
are bi-concave lenses with concave surfaces on both sides. Double concave lens are ]]></description><pubDate><![CDATA[20241022]]></pubDate></item>
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<title><![CDATA[Plano Convex or Concave Square Cylindrical Cylinder Lens]]></title><link><![CDATA[https://xinxingliangoptics12.en.ec21.com/Plano_Convex_or_Concave_Square--11974068_11974077.html]]></link><description><![CDATA[Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lense]]></description><pubDate><![CDATA[20240724]]></pubDate></item>
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<title><![CDATA[Plano Concave Lenses]]></title><link><![CDATA[https://syccooptics.en.ec21.com/Plano_Concave_Lenses--11952878_11952885.html]]></link><description><![CDATA[Plano concave Lenses
have one concave surface. It has negative focal length. It is often used to expand light or to increase focal length in existing systems.
Plano-Concave Lens Specifications:
Mater]]></description><pubDate><![CDATA[20240617]]></pubDate></item>
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<title><![CDATA[Custom Plano-Concave Lenses for Laser Optics]]></title><link><![CDATA[https://clzoptics.en.ec21.com/Custom_Plano_Concave_Lenses_for--7138952_8659156.html]]></link><description><![CDATA[Custom Plano-Concave Lenses for Laser Optics
Product Description
Plano-concave lenses
convert incoming parallel light rays into diverging beams that appear to come from a point in object space, the s]]></description><pubDate><![CDATA[20240403]]></pubDate></item>
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<title><![CDATA[BK7 Double Concave Lens]]></title><link><![CDATA[https://albrighter.en.ec21.com/BK7_Double_Concave_Lens--10771415_11766090.html]]></link><description><![CDATA[Double concave lens is similar with plano concave lens. The focus length is negative. It can make parallel light diverge outside. The two sides have same radius of curvature. Double convex lens gener]]></description><pubDate><![CDATA[20230407]]></pubDate></item>
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<title><![CDATA[Plano Convex Concave Lenses  Bi Convex/Concave Lenses  Meniscus Lenses  Achromatic  Lens AR Coating]]></title><link><![CDATA[https://kelly258.en.ec21.com/Plano_Convex_Concave_Lenses_Bi--10746701_10746712.html]]></link><description><![CDATA[Manufacture Specifications
Diameter
0.1mm to 600mm.
Diameter Tolerance
+0.00/-0.1 or customer size. 
Material 
N-BK7,H-K9L,Sapphire,Fused Silica(JGS1),Caf2,ZnSe,Si,Ge,Corning 7980
Surface Quality
80-]]></description><pubDate><![CDATA[20230922]]></pubDate></item>
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<title><![CDATA[Double Concave Lens]]></title><link><![CDATA[https://daisydong147.en.ec21.com/Double_Concave_Lens--10848859_10849633.html]]></link><description><![CDATA[A double-concave lens is compose of two concave surface, has a negative focal length and are best used to diverge a converging beam. Similar to a plano-concave lens, a bi-concave lens can diverge a c]]></description><pubDate><![CDATA[20181108]]></pubDate></item>
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<title><![CDATA[Bi Concave Lens]]></title><link><![CDATA[https://jiffoptics.en.ec21.com/Bi_Concave_Lens--5677474_5734760.html]]></link><description><![CDATA[ãCoating :Uncoated, AR, HR, PR Coating, etc. 
We could offer concave lenses according to custom design. Such as plano concave, doulbe concave,positive lens or negative lens.
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<title><![CDATA[Optical Instruments Aspheric Glass Spherical Positive Achromatic Concave Convex Meniscus Lens]]></title><link><![CDATA[https://shyannie.en.ec21.com/Optical_Instruments_Aspheric_Glass_Spherical--11866430_11871031.html]]></link><description><![CDATA[The term aspheric mirror literally means a mirror that is not spherical. More-specific terms like parabolic mirror, hyperbolic mirror, and flat mirror are generally used for specific mirrors to which]]></description><pubDate><![CDATA[20231128]]></pubDate></item>
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<title><![CDATA[Plano Convex or Concave Square Laser Cylindrical Lens Cylinder Lens]]></title><link><![CDATA[https://worldhawkcindy.en.ec21.com/Plano_Convex_or_Concave_Square--11489283_11489291.html]]></link><description><![CDATA[Plano Convex or Concave Square Cylindrical Cylinder Lens
Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, ]]></description><pubDate><![CDATA[20240201]]></pubDate></item>
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<title><![CDATA[2023 Free Sample/Inquiry for Drawings Plano-Concave Lens OEM Optical Lenses]]></title><link><![CDATA[https://oplens68.en.ec21.com/2023_Free_Sample_Inquiry_for--11609135_11609146.html]]></link><description><![CDATA[A plano-concave lens
is a lens that has a flat surface on one side and a concave surface on the other side. The focal length of a plane-concave lens is negative, allowing the beam to diverge. Therefo]]></description><pubDate><![CDATA[20230809]]></pubDate></item>
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<title><![CDATA[Ball Lenses]]></title><link><![CDATA[https://jtoptic.en.ec21.com/Ball_Lenses--11940832_11940836.html]]></link><description><![CDATA[concave, double concave, meniscus, achromatic doublets and triplets, develop and manufacture high-end optics from 0.5 mm to 600 mm in diameter, which use in many different fields of application, from]]></description><pubDate><![CDATA[20240522]]></pubDate></item>
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<title><![CDATA[Spherical Opical Lens,Rod Lens, Sapphire Optical Lens, Cylindrical Lens,Cemented Lens,]]></title><link><![CDATA[https://valinar.en.ec21.com/Spherical_Opical_Lens_Rod_Lens--11909337_11909340.html]]></link><description><![CDATA[Co.,Ltd manufactures all kind of shperical optical lens as well as sapphire optics , products as Bi-concave lens, Bi-convex lens, plano-convex lens , plano-concave lens, meniscus lens,rod lens, etc
]]></description><pubDate><![CDATA[20240320]]></pubDate></item>
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<title><![CDATA[Optical Glass]]></title><link><![CDATA[https://aohonggaugeglass.en.ec21.com/Optical_Glass--11850290_11850300.html]]></link><description><![CDATA[concave (PCV), or double-concave (DCV) lenses. They are commonly made from materials such as soda-lime, borosilicate, and quartz, with diameters varying from 1mm to 300mm and tolerances held to withi]]></description><pubDate><![CDATA[20231004]]></pubDate></item>
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<title><![CDATA[High Precision Spherical Plano Convex Lens JGS1]]></title><link><![CDATA[https://ruikeoptics000.en.ec21.com/High_Precision_Spherical_Plano_Convex--11732883_11732884.html]]></link><description><![CDATA[Instruments.Our target is High Precision but not expensive.
Spherical Lens:
Plano convex,achromatic,meniscus , plano concave.
Diameter 1-500mm
Surface Quality:20-10
Flatness:1/20 lambda
AR Coating
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<title><![CDATA[Optical Glass Sapphire K9/B270 Endoscope Rod Lens for Medical Instruments]]></title><link><![CDATA[https://june20210728.en.ec21.com/Optical_Glass_Sapphire_K9_B270--11547959_11548024.html]]></link><description><![CDATA[concave, cemented etc which applied in medical endoscopes.
Commonly,
rigid endoscopes have a series of high-resolution optical glass rod 
lenses.The optical quality of lens-generated images of rigid ]]></description><pubDate><![CDATA[20230922]]></pubDate></item>
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<title><![CDATA[Precision Lenses]]></title><link><![CDATA[https://bill2021.en.ec21.com/Precision_Lenses--11096792_11096793.html]]></link><description><![CDATA[All kinds of regular and bespoke optical lenses:
achromatic doublets, achromatic triplets, plano-convex lenses, plano-concave lenses, double-convex lenses, double-concave lenses, meniscus lenses, lar]]></description><pubDate><![CDATA[20200407]]></pubDate></item>

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