The first subgroup has a meniscus lens, concave towards the object, with a negative refraction, while the following subgroup contains at least four lenses with positive or negative refraction. The arrangement meets a specified relationship of focal length of the first group front subgroup, the ...
Design method on the stabilized zoom lens design of focal-length-variable elements The theoretical method for analyzing the first-order optics of stabilized zoom lenses with two focal-length-variable elements is presented. The first and s... Q Hao,X Cheng,K Du - International Conference on Opti...
The 3rd group consists of one or two positive lenses and one negative lens which has a large- curvature concave surface on the image side in order from the object side, the 4th group consists of one biconvex lens, and the 3rd or 4th group includes at least one lens with an aspherical ...
I am using two focal lengths that should work well with APS-C sensors. It should be close enough to resolve some detail of the sun, yet wide enough to capture the corona stretching out during totality. I plan to have both rigs running as close to autopilot as possible. I may need som...
The apparatus employed in the following experiments used a helium-cadmium laser. Four lenses were used in tandem to spread the beam. In the order extending away from the laser, the lenses were cyl. Rolyn lenses nos. 14.0050, 14.0100, 10.0050, and 10.0385 respectively, with focal lengths 22.2...
The initial model of the complete lens is constructed by two parts. One part... JC Xing,H Li,ZQ Zhang,... - 《Applied Optics》 被引量: 0发表: 2022年 Fast Focal Point Correction in Prism-Coupled Total Internal Reflection Scanning Imager Using an Electronically Tunable Lens Total internal ...
Zoom lens of reduced total length 优质文献 相似文献 参考文献 引证文献2X Optical Digital Zoom Lens with Short Total Length and Extremely Small Front Aperture for Two Million Pixel CMOS on Mobile Phones 2X Optical Zoom lenses on compact mobile phone are nowadays increasingly demanded but few samples...
A polycapillary lens (PCL; Hamamatsu Photonics) with a focal length of 45 mm and a diameter of 4 mm was used to moderately col- lect X-rays at the sample position as a condenser. It was additionally used as a deflector by employing the outer- most region. This is because the ...
of the eyes. After surgery, all patients were prescribed topical prednisolone acetate (Allergan Pharmaceutical Ireland, Westport, Ireland) and levofloxacin (Cravit, Santen Pharmaceutical) to be instilled four times a day for two weeks; and pranoprofen eye drops (Pranopulin, Senju Pharmaceutical, ...
lenses, is hermetically sealed, and has a wall in which a window is formed so as to allow passage of said one or more collimated laser beams through the window, and a first cross section perpendicular to an optical axis of the optical fiber at the light-entrance end face; and a second...