Teslong 3-Mirror Kit For NTG100/150/450/500 Borescopes - scope mirror

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Technical data and downloadsWavelength1030...1080 nm515...540 nm355 nmOrder No611842627445613266Datenblatt (pdf) -one for allBEX-M 1x-8x.pdfBEX-M 1x-8x.pdfBEX-M 1x-8x.pdfSTEP-Datei (stp) -one for allBEX-M 1x-8x.stpBEX-M 1x-8x.stpBEX-M 1x-8x.stpZemax-Blackbox (zip)BEX-M 1x-8x 611842.zipBEX-M 1x-8x 627445.zipBEX-M 1x-8x 613266.zip

Beamdivergence calculator

I'm new to film photography (~4 months in) and happened to have questions regarding on how to achieve a particular look. I'm not necessarily looking to emulate the look, rather, understand what went into it and how those particular choices influenced the outcome of the images. Here are a couple of examples:

In older images, another factor may enter into a "soft contrast" image: lens flare. Prior to the early 1940s, lenses did not receive anti-reflection coatings (the process hadn't been invented yet), so each glass surface interface resulted in light scattering, which (especially with a bright area in view relative to the main exposure) tended to fill in shadow areas and reduce overall contrast. This is also why pre-War lenses were usually designed to avoid high element counts -- triplets, 4-element Tessar types and 5-element Heliars, the largest element count that was at all common before 1945 was the six-element Xenon (I have one, it's an awesome lens, but it does flare some against the light).

This beam expander is designed for a wavelength of 355 nm and offers a large input aperture of up to 8 mm (1/e2). It offers clear and stable laser power and can be used with a 1.5x, 2x, 4x or 8x expansion factor at high powers. The high-precision optical design ensures diffraction-limited imaging and prevents internal foci. It also comes with a divergence setting as standard. The housing is made of stainless steel for maximum resistance and durability, and the optical elements are made of robust quartz glass with AR coating. For use in its reverse mode, the beam expander is threaded on both sides.

The 1x-8x beam expanders are part of the SilverlineTM high-power lens series and are designed in such a way that a diffraction-limited image quality is achieved over the entire magnification range.

How to make abeamexpander

One relatively common application of pull processing is to produce a "high key" image -- low contrast development combined with higher than normal exposure, then printing at high contrast to bring out only selected features of the image.

How does one achieve that hazy, soft, low-contrast, but, at the same time, somewhat overexposed look? Is this something that one would achieve while shooting? In the darkroom?

Thanks to corresponding software interfaces, the motorized beam expander can be easily integrated into any system for laser material processing.

Do not leave reliable beam guidance to chance but to a competent partner. Jenoptik’s beam expanders offer extensive optical know-how and many years of application expertise.

With the adjustment set from Jenoptik, optical beam expanders can be integrated even more easily in the laser beam path, both during initial commissioning and during ongoing operation. The innovative clamping device can be used seamlessly, with 4 mm adjustment travel and standardised screw connection. As a result, the optical components can be adjusted to each other more quickly yet with high precision. The system can be freely adjusted in 4 different degrees as well as in X and Y direction.

The BEX 1x-4x steadfast beam expanders are characterized by a mechanical design that guides the movable optical elements in a stable, linear manner. This reduces the influence of mechanical manufacturing irregularities and increases beam stability whenever changing magnification and/or divergence. This ensures a beam direction stability of less than one milliradian.

Laserbeam

Optimized coatings ensure the highest transmission and lowest thermal influences. To ensure durability and a high destruction threshold in high-power laser applications, we use full quartz as the lens material.

Any particular suggestions, explanations on what went on to achieve the images, or aid would be greatly appreciated. Thank you!

The Fix-BEX 515...540 nm demonstrates its advantages for applications in the FIS sector. It has excellent directional stability and thus consistently offers high beam quality. Like all other versions, it offers a large input aperture of up to 8 mm (1/e2) and diffraction-limited imaging. Internal foci are prevented thanks to the sophisticated high-precision optic design. The divergence of the laser beam can also be adjusted. The optical elements are made of robust quartz glass with AR coating. In addition, the Fix-BEX can be used in reverse mode, as the beam expander is threaded on both sides.

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Machine integrators, contract manufacturers and laboratories benefit from the simple combining of optical components in their laser systems and faster commissioning.

Jenoptik’s Fix-BEX product line offers the right solution for applications that do not require changes to the zoom factor.

Technical data and downloadsZoom Factor1,5x2x4x8xOrder No663991*663992*663993*663994*Data sheet (pdf) - one for allFix-BEX 355nm.pdfFix-BEX 355nm.pdfFix-BEX 355nm.pdfFix-BEX 355nm.pdfSTEP data (stp)Fix-BEX 355nm 1,5x.stpFix-BEX 355nm 2x.stpFix-BEX 355nm 4x.stpFix-BEX 355nm 8x.stpZemax-BlackboxFix-BEX 663991.zipFix-BEX 663992.zipFix-BEX 663993.zipFix-BEX 663994.zip *available soon; please contact us for delivery time information

Reduced contrast is generally achieved with film by developing less than "normal" -- this produces a lower slope on the linear portion of H/D plot (that is, less increase in negative density for a given increase in log exposure), which we see as less contrast. In Zone terms, by developing less, you keep the low zones nearly the same, but the higher exposure zones develop to lower values.

These beam expanders are specifically designed for applications where widened beam diameters are required. The larger the expanded beam, the smaller the structures can be produced with a paired F-Theta objective lens.

A focus ring allows the divergence of laser beams to be changed in a targeted manner, thus compensating for the focal length tolerances in the overall system. This also makes it possible to change the position of the working plane according to the scanning system.

Gaussianbeamcalculator

The BEX 2x-10x variable beam expanders for the wavelengths of 355 nm, 532 nm and 1030...1080 nm have a particularly large zoom range. All versions have an infinitely adjustable zoom factor between 2x and 10x.

Settings can also be conveniently locked. Therefore, influences such as vibrations or system accelerations system are minimized. In addition, the BEX 1x-4x Steadfast stands for easy maintenance and minimal set-up times.

Spot size

Going along with this is the need to expose more in order to provide correct high values in the positive (print or scan). Together, exposing more and developing less are referred to as a "pull" -- the opposite of "push" in which film is knowingly underexposed and overdeveloped to compensate (perhaps because the light level is too low for the available film and lens combination, or perhaps in order to boost contrast on a low contrast scene).

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The BEX 1x-4x variable beam expanders for the wavelengths 355 nm, 532 nm and 1030...1080 nm provide a high image quality with their compact lengths. All versions are infinitely adjustable between a 1x and 4x expansion factor. The larger the expanded beam, the smaller that structures can be created with the paired F-Theta objective.

BeamExpander Thorlabs

Whether manually or variably adjustable or motorized, the beam expanders of the BEX product families are robust, flexible and durable.

With the motorized beam expander 1x-8x, Jenoptik helps you adapt to market requirements by optimizing and balancing the critical parameters of time, quality and ease of use. Consequentially, the motorized beam expander is a perfect match for the F-Theta lenses of Jenoptik’s SilverlineTM series and can be used in a variety of beam guidance systems.

I remember reading somewhere how, for the Edward Weston one, one could achieve the "soft focus" look through the means of a pantyhose or a bit of vaseline rubbed around one's lens, but as for the other ones, I have no clue.

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