CCFC is a company, which founded in 2004,mainly developing, designing and manufacturing optical elements and equipments and located in Changchun City, China. The company has trade department and optical factory.
A lens having at least one surface that is formed like a portion of a cylinder.Cylindrical lenses are used to correct astigmatism in the eye,and,in rangefinders,to produce astigmatism,stretching a point of light into a line.
An optical device for dividing a beam into two or more separate beams.A simple beamsplitter may be a very thin sheet of glass inserted in the beam at an angle to divert a portion of the beam in a different direction.A more sophisticated type consists of two right-angle prisms cemented together at their hypotenuse faces.The cemented face of one prism is coated,before cementing,with a metallic or dielectric layer having the desired reflecting properties,both in percentage of reflection and the desired color.
光学窗口片
任何一种光学仪器的用途和使用条件必然会对它的光学系统提出一定的要求，因 此，在我们进行光学设计之前一�...
