With over 15 years of experience and 500+ unique optical systems designed, Optics for Hire specializes in advanced optical engineering. If it uses light, we've worked on it.

TIRlens

The main consequence of this small change is that we don’t have a set distance between the objective lens and the tube lens (although it is usually set somewhere between 160mm to 200mm) and it is possible to add optical elements in between without affecting the quality of the image. Figure 2 shows an infinity corrected system

The rear lens focuses and magnifies the beam onto the larger 5.5” front Fresnel lens, maximizing light utilization. Our dual lens optical design makes the Fresnel 2X twice as powerful as the original Aputure Fresnel, and makes the 120d II almost 10 times brighter than with the reflector.

Infinityoptical system

By utilizing a new rotating barrel design, the Fresnel 2X creates an intuitive user experience, similar to a camera lens. The smooth focus throw gives users an ability to accurately finesse the beam angle of their light source, allowing you to easily spot or flood your light with a simple twist.

One solution is the introduction of infinity corrected lenses. In this microscope’s optical design, the objective creates the image at infinity and a new optical element called the tube lens creates the intermediate image that is picked up by the eyepiece.

Tubelens

In the last 10-15 years, there has been a shift in the design of microscope systems. Many new and complex microscopy applications require additional components such as filters, dichroic mirrors, and similar elements. We refer our readers to this previous blog about scanning and fluorescent microscope design

Objective lens

By utilizing a universal Bowens Mount, this fresnel can be attached to a myriad of lights. The 7” front ring also accepts the Aputure Barndoors, meaning your light shaping options are endless. With the included carrying case, the Fresnel 2X can easily follow you wherever your shoots may take you.

One limitation of finite microscope is that the tube length distance is fixed (usually at 160 mm) and if we add any elements in the tube, this distance will be affected and we will need to redesign our eyepieces and objective lenses. This can increase cost and may introduce unwanted aberrations.

The objective lens will create a real image somewhere in the tube. This image is usually referred to as an intermediate image. The eyepiece is then placed such that it will create a virtual image out of the intermediate image. This allows the user to relax their eye and focus away from their near focal distance reducing strain on their eyes. Figure 1 shows a simplified version of an finite microscope optical layout.

Traditional microscope systems consist of two main optical elements: a microscope objective and an eyepiece. The microscope objective is placed close to the sample that we want analyzed. The distance between the objective lens and sample is called the working distance and depends on the magnification of the objective lens.

With over 20 years of experience and 800+ unique optical systems designed, Optics for Hire specializes in advanced optical engineering. If it uses light, we've worked on it.

The Fresnel 2x design features dual optical intensifying elements, a large 5.5” front Fresnel lens, improved ventilation, and the elimination of light leaks, making this the ultimate Bowens Mount Fresnel.

Figure 2. In an infinity corrected system, the objective lens creates a series of collimated rays and the tube lens creates the intermediate image. Figure from Edmund Optics.