Sapphire Flat Optical Window
830nm narrow-band filter is mainly used in: fluorescence microscope, biochip, spectrophotometer, medical physical and chemical analysis equipment, criminal detection, optical instruments, scientific photography, life science detection instruments, etc.
Borisun Optics focuses on the R & D, production and sales of filter. It is a reliable manufacturer. 830nm band-pass filter has deep background, high wavelength positioning accuracy, IAD coating process, no drift, stable performance, and the size can be processed according to needs.
Sapphire optical windows are flat polished products based on single crystal sapphire processing.
Single crystal sapphire windows are ideal for use in demanding applications such as laser systems because of their extremely high surface hardness, high thermal conductivity, high dielectric constant, and resistance to chemical acids and bases.
Since sapphire is second only to diamond in hardness and its structural strength is very high, the thickness of sapphire windows made through enhanced light transmittance is thinner than ordinary high-dielectric windows.
Chemically speaking, sapphire is a single crystal of aluminum oxide (Al2O3), which is ideal for transmission between 0.2 and 5.5μm.
In general optical applications, customers’ basic needs can be met without coating treatment. Our products can also undergo coating treatment, silk screen treatment or special heat treatment according to customer needs to adapt to the special needs of customers.
Our company’s sapphire flat windows are divided into bare windows and windows that require coating based on specific transmission (cut-off film or anti-reflection film).
Sapphire flat windows have the following characteristics:
- High purity of material: Sapphire crystal grown by the bubble growth method (KY) has higher purity, total impurity content <2ppm, low absorption and high transmission in the ultraviolet band.
- High-quality surface: the smoothness is at least 40/20, the roughness is <0.2nm, and the transmission surface profile is better than 1/20.
- Flawless appearance: Chips, missing corners, and internal cracks are not allowed, because the existence of these defects will lead to the extension of defects during user use, eventually leading to product failure and scrapping.
| Items | Parameters |
|---|---|
| Material | sapphire glass |
| Diameter | 3mm-500mm ± 0.1mm |
| Center thickness tolerance | ± 0.05mm (we can process to ± 0.01mm with high precision) |
| Center deviation | 3′(we can process to 10 ″with high precision) |
| Surface accuracy | λ/ 8 (high precision, we can process to 1 / 20λ) |
| Surface quality | 40/20 (we can process to 10-5 with high precision) |
| Effective caliber | ≥90% |
| Coating | according to the custom requirements |
Processable Sapphire Window Types
Sapphire coated optical window
The sapphire coated window adopts single-sided or double-sided coating, which can increase the transmittance of a specific band from 85% to 92%-98% within the sapphire transmission band (280-5500nm); it can also be plated to cut off specific bands. membrane. In response to the demand for strong lasers, we can provide high-threshold coatings. Through the optimized design of materials and film systems, we can meet the needs of strong lasers.
Sapphire UV Level Window
Sapphire material itself is an excellent UV material. Under normal conditions, the starting wavelength band of UV is 220nm; We can provide low-absorption KY sapphire windows that move the UV transmission starting band forward to 168nm. Combined with scientific coating processes, sapphire UV windows can meet customers' wider and deeper applications.
Sapphire transmission window
Sapphire transmission windows are the most widespread application of sapphire windows.
In order to meet the needs of customers in imaging, strong laser, precision measurement, etc.
our sapphire transmission windows are processed into high transmission surface profiles and high smoothness. The transmission surface shape (wavefront distortion) can reach up to 1/20λ, the smoothness reaches 10/5 level, and the surface roughness is <0.5nm.
Sapphire single-sided reflective window
Sapphire reflective windows are widely used in optical tracking, measurement, fiber reflection and other fields. Due to the excellent and stable performance of sapphire material, it is increasingly replacing traditional materials such as quartz and is being used more and more widely. Our sapphire reflective window single-sided surface type (PV) can reach up to 1/20λ, the smoothness reaches 10/5 level, and the surface roughness is <0.5nm. At the same time, supporting services such as metal reflective coating and anti-reflection coating can be provided.
Sapphire protection window
Sapphire protection windows (protective windows) are processed using the physical and chemical properties of sapphire and are used to protect internal instruments or container seals in specific environments (high temperature environments, pressure environments, corrosive environments, etc.) to effectively isolate the environment and observers A special window. Depending on the use environment, sapphire protection windows can be divided into the following categories: Pressure resistant protection window; High temperature protection window; Deep water protection window; Chemical corrosion protection window; Sapphire protection windows are generally used in underwater detection, high-temperature scenes, oil field exploration, pressure vessels, chemical industry sites, and high-power laser operation protection.
We can customize the optical sapphire window according to customer requirements or drawings.
For details, please consult:
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