i want to know how to make a binocular loupe. the distance of object is 29 cm. the magnification is 5x. the distance of image can be at 20 cm or more or less.
there are 2 or more lenses uses. i need their diapter or focal length and the distance between them. i may ot use mirror inside the tube and the length between the lenses can become more. that is ok or if someone knows hor to make prism for reducing the length of this magnification loupe it will be appreciated.
thanks.
2007-02-05 04:12:45 · 1 answers · asked by kirtibd 1 in Science & Mathematics ➔ Physics
The magnification to first order is the ratio of the object and image distances, so you need an image distance of 28/5 cm. The focal length is 1/f=1/i+1/o. Two lenses have an equivalent focal length given by 1/fc = 1/f1 + 1/f2 -d/(f1*f2), where fc is the combined focal length, f1 and f2 are the focal lengths of the two lenses and d is the distance between them. You can model your system with optical design software. I would recommend that you download Oslo Edu to learn the basics. Note that all dimensions are conventionally in mm.
2007-02-08 17:36:41 · answer #1 · answered by d/dx+d/dy+d/dz 6 · 0⤊ 0⤋