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Adjustable Apertures

The MID5C is a high-precision Motorized Iris Diaphragm featuring an adjustable square aperture, controlled via an intuitive PC-based graphical user interface (GUI). Its uniquedesign ensures that the metallic blades maintain perfect onaxis centering relative to an internal hole - which can optionally be configured with an ...

Specifications

Aperture Shape: Square
Material (body): Anodized Aluminum
Material (blades): Aluminum
Aperture Size: 0 – 5 mm
Microstep Size (Default Resolution): 1 µm
The MID14C is precise motorized iris diaphragm controlled via PC and intuitive graphic user interface (GUI). Due to the unique design, an aluminum blades forming square diaphragm always remains centered about an “optical axis” including internal SM1–threaded hole. Even while tuned from 0 to 14 mm size, the diaphragm always maintains ...

Specifications

Aperture Shape: Rectangle
Material (body): Anodized Aluminum
Material (blades): Aluminum
Aperture Size: 0 – 14 mm
Microstep Size (Default Resolution): 10 µm
The MD12 is client-inspired very handy manually adjustable mechanical diaphragm. Intuitively simple aperture control consists of 4 independently-controlled aluminum sliding jaws, which can form either rectangle or square aperture of any size within 0…12mm range. Black anodized finish aluminum blades greatly reduce unwanted ...

Specifications

Aperture Shape: Rectangle
Material (body): Black Anodized Aluminum
Material (blades): Aluminum
Aperture Size: 0 – 12 mm
Aperture Shape: Square or Rectangle

Adjustable Apertures for Precision Light Control

Adjustable apertures are essential components in optical systems where dynamic control over beam size, intensity, or spatial filtering is required. These opto-mechanical devices feature variable openings that can be mechanically adjusted to tailor the diameter of a transmitted light beam. Widely used in laboratory setups, laser systems, imaging devices, and photonics research, adjustable apertures offer flexibility and fine-tuned control that fixed apertures cannot provide.

The primary function of an adjustable aperture is to regulate the amount of light that passes through an optical path. By modifying the aperture size, users can limit stray light, enhance contrast, or isolate specific parts of a light beam. In microscopy and spectroscopy, for example, controlling the illumination area improves signal-to-noise ratios and image quality. In laser applications, adjustable apertures are often employed to shape the beam or block peripheral noise, thereby enhancing performance and safety.

Adjustable apertures are available in a variety of designs, including iris diaphragms, sliding blade apertures, and precision pinholes. Iris diaphragms are among the most common types and consist of overlapping blades that expand or contract in a circular motion. These are ideal for applications that require smooth, continuous adjustment of aperture size. Sliding blade models, on the other hand, use linear movement to alter the opening, making them well-suited for rectangular beam shaping or applications where a different aperture geometry is preferred.

When selecting an adjustable aperture, it's important to consider factors such as aperture range, mechanical stability, material compatibility, and mounting options. Many models come integrated with standard optical mounts for seamless integration into optical tables or lab setups. Materials like stainless steel, anodized aluminum, or blackened metals help reduce unwanted reflections and increase the durability of the device.

At FindLight, you can explore a curated selection of adjustable apertures from trusted manufacturers around the world. Whether you're developing a precision optical instrument or upgrading a laser lab, these versatile components provide the control and accuracy required for high-performance photonics applications.

Optimize your light management systems with precision-engineered adjustable apertures—shop today on FindLight and find the right solution for your optical needs.

Did You know?

In optics, the word aperture describes a hole or opening through which light travels. Aperture is crucial in a number of optical instruments such as cameras and telescopes. Adjustable apertures, manual or automated, are typically used in applications where limiting or shaping incident light is required. For example, rectangular apertures can be used to define the boundaries of an optical path or to mask out specific areas in an optical system, like on a test target, monochromator, CCD or a detector.