objectiva longa focal translations in Russian длиннофокуснаяоптика translations in Chinese 长焦镜头 - chang jiao jing tou Submit a translation comment The compounds withfocal-length short focal-length lens variable focal-length lens...
Second lens group has one biconvex lens. Third lens group is made of two positive meniscuses and biconvex lens placed between them. One of its meniscuses faces space of objects with concavity and the other one - with convexity. Positive meniscuses of first and third lens groups can be ...
Equally important is that such a flat lens could stably keep a lateral subwavelength width of 0.42λ to 0.49λ along the needle-like focal region. It exhibits one-order improvement in the focal length compared to the traditional focal lengths of 20~30λ of flat lens, under the criterion of...
The focal length of the convex lens I require for my right eye in reading is twelve inches, and I find that by holding a lens of 30-inch focus about a foot from this eye I am enabled to see distant objects not only with singular distinctness, but also perceptibly magnified. I can ...
Customized Size/Focal Length Spherical/Aspherical Rod-like Long Cylindrical Lenses Superior in Quality Negotiable 1 Piece (MOQ) Product Details Customization: Available Usage: Lighting, Medical, Optical, Photography, Metrology Type: Cylindrical lens Co...
In order to achieve beam combination of volume Bragg grating diode lasers(VBLs) in the external cavity,characteristics of VBL with long cavity length is studied.A plane convex cylindrical lens with focal length of 25 mm is used to collimate the single emitter laser diode(LD) in slow axis dir...
*(n-1)/(FNO*R1) <2, wherein the f is a focal length of the whole optical system, n is a central wavelength refractive index of the first lens material; the FNO is the F number of the optical system; and the R1 is a concave surface approximate curvature radius of the first lens....
Name:LWIR Athermal Lens for Thermal Imaging;Model:RSA19F1.2-640-12;Focus Length:19mm;F/#:1.2;Detector:640x512-12um;Material:Germanium (Ge);Wavelength:8um-12um;Circular FOV:(H)22.8°x(V)18.4°X(D)29.4°;Weight:18g;External Coating:AR coating available;war
The analyzed segment of the aTNTA was irradiated by a diverging laser beam formed using the convex lens with a short focal length (38 mm). The distance between the irradiated sample and the beam waist was equal to 500 mm, and the diameter of the light spot on the sample surface was equ...
Round pattern reticle lens, 3 micrometer etching tech factory price optical reticles Supplier's reply: Great buyer! Nice person with smart design. hope can do business again. N N***i May 30, 2024 great Various focal length diameters thicknesses flat concave convex lens optical lens ...