Zemax object space na

In this article, we discuss three different methods of making a lens that is telecentric in image space in opticstudio. This conversion takes place after many calculations like hidden surface removal, shadow generation and z. Even if you are an experienced zemax user, it is still a good idea to keep this book as a reference. By definition, the effective focal length efl is the distance between the. Exercises lecture optical design with zemax part 1 1. Image space telecentric lenses are useful for a variety of applications, e.

Contribute to dariussullivanlibzmx development by creating an account on github. An entrance pupil at infinity makes the lens object space telecentric. Modeling holographic grating imaging systems using the. Tutorial of telecentric lens university of arizona. Under this circumstance, the software set the real object na rona and paraxial object na. Journal of biomedical optics 0960032 september 20 vol. A mtf of an ideal objective lens without central obscuration. Solution of exercises lecture optical design with zemax. A reconstruction in zemax of the lens given from the prescription given by patent us5841590 a, aberration controllable optical system, by haruo sato, nikon corporation. Design of a highnumericalaperture miniature microscope. Zemax reconstruction of defocus control lens 105mm f2. Special requirements to the illumination optics and imaging optics are presented.

A terahertz thz time domain imaging system is analyzed and optimized with standard optical design software zemax. In fact, after defining the object type, zemax will automatically generate some default properties, so we only. Some methods are easy to implement, other require more material and analyses, with more accurate measurements. Default merit function in zemax is used to focus the. Numerical aperture is not typically used in photography. Different possible options for specification of the aperture in zemax. By continuing to use this website, you consent to the placement and use of cookies as described in. Gradientindex lenses in imaging applications using zemax. Osa design and evaluation of a thz time domain imaging. B mtf of the aspheric schwarzschild objective listed in table 1. The glasses can be substituted from the abbe numbers and nd given.

Entrance pupil diameter is perhaps the most commonly used system aperture type and is the most convenient definition for the current example. Creating highaccuracy telecentric lenses for machine. Another way to look at this is by reexamining the concept of numerical aperture na discussed in microscopes. Image space positions are measured with respect to the image surface. Designing a product for manufacturability means that it can be built within budget, and there are four critical elements for optical engineers to consider when designing an optical product for manufacturability. Each operand may weightwhich indicates relativeimportance target,which desiredvalue listedbelow. By continuing to use this website, you consent to the placement and use of cookies as described in our cookie policy.

Figure 5 shows the basic definition of throughput tp as expressed in equation 1. The first prescription in the written part is analysed. The definition of corningb for the numerical aperture is the sin of the half angle to 1% of the peak center intensity. In 3d computer animation images have to be stored in frame buffer converting two dimensional arrays into three dimensional data. Such lenses are used in machine vision systems because image magnification is independent of the object s distance or position in the field of view. Similarly, we defined the second object lines 4767. At the operating wavelength of 1064 nm the airy disk diameter for. In the optimized system, offaxis parabolic mirrors and lenses are combined.

An exit pupil at infinity makes the lens imagespace telecentric. Image space telecentric lenses have their exit pupil located at infinity. Image measurement in object space telecentric system object space telecentric systems are almost always used at close finite conjugates. The image on the left is for the ypupil coordinate, this has been improved over the original planar hologram described by verboven. With bitelecentric lenses, the magnification in both image and object space is independent of distance within the depth of field or the position in the field of view. Gradientindex lenses in imaging applications using zemax program. As the nominal object distance increases, the image and the detector move closer to. The numerical aperture of a lens is defined as the sine of the marginal ray angle in image space, and is shown in figure 1.

We use cookies on this website to enhance your user experience, improve the quality of our site, and to show you information that is more likely to be relevant to your interests. This ratio is related to the image space numerical aperture when the lens is focused at infinity. Given that the apertures of the microscope objectives are always specified by na, it is intuitive to use the object space na ona to define the aperture for the conventional raytracing method a. The index in both the object space and image space is considered. The image on the right is for the xpupil coordinate, this is slightly worse than the original design because this design considers three. The na of the miniature microscope objective in image space is na image 0. Each of these types are defined in more detail in the following section of the zemax users guide. Analysis of the mtf in object space using zemax software. The numerical aperture in the object space is na 0. Modeling a lens that is telecentric in image space zemax. Thorlabs has collaborated with navitar to design and manufacture a line of telecentric lenses for machine vision applications. A standard lens object is created with a radius of curvature of 500mm and a radial dimension of 7.