OPB-40C01-P 40 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=1 mm Uncoated

The OPB-40C01-P is a 40 mm diameter N-BK7 round optical parallel flat window, featuring a thickness of 1 mm and uncoated surfaces. This component is sourced from OptoSigma, a reputable vendor known for its extensive range of optical elements.

The window is designed as a flat window, which is a simple optical component with two parallel surfaces. It is used to protect optical systems from environmental contaminants while minimally affecting the light path. The round shape of this window is versatile and can be used in various applications where a circular aperture is required.

The material of this window is N-BK7, a type of borosilicate glass known for its excellent optical properties. It has a refractive index of 1.5168 at 588 nm, making it suitable for use in a wide range of wavelengths. The use of N-BK7 ensures high-quality optical performance and durability.

The window is uncoated, meaning it does not have any additional layers applied to its surfaces. This can be beneficial in applications where the natural properties of the glass are desired, or where cost considerations are a factor. However, it's important to note that uncoated surfaces may be more susceptible to environmental factors such as dirt, dust, or moisture.