Calcium fluoride windows are considered for optical systems that require ultraviolet, visible or infrared transmission. For spectroscopy and analytical instruments, procurement should start with the actual wavelength band, material grade, optical path and acceptance test rather than a broad material label.
Product Description
A CaF2 optical window is a polished calcium fluoride element used to transmit light while forming part of an optical boundary. It differs from a focusing lens: a lens needs its own curvature, focal-length and optical-design specification.
Xinkehui receives enquiries for calcium fluoride optical components. The local product collection provides photographs of transparent components, but it does not establish a universal size range, surface-quality grade, coating performance or manufacturing tolerance. The final supply specification must be agreed for the individual order.
Product Applications
UV spectroscopy and analytical instruments
CaF2 can be considered for ultraviolet optical paths when the selected material grade and finished component meet the instrument's wavelength and transmission requirements. Define the lowest operating wavelength, test method and allowable absorption or transmission loss.
Infrared spectroscopy
For infrared instruments, evaluate the intended spectral band together with thickness, substrate quality and coating. Do not assume suitability for every infrared detector or thermal-imaging band.
Laser and laboratory optical assemblies
CaF2 optical components may be evaluated for suitable laser wavelengths. Qualification requires the laser operating conditions, beam size, coating and mounting arrangement; a generic material description is not a damage-threshold certificate.
Process-monitoring and research optical paths
A window can form part of a controlled measurement path. Exposed media, cleaning practices, temperature and mechanical stresses must be reviewed separately from optical suitability. Avoid implying that all CaF2 windows are pressure-rated or chemically compatible with every process.
Product and Procurement Advantages
Cross-band material evaluation
Calcium fluoride offers a material option to evaluate across ultraviolet and infrared optical requirements. The usable band remains dependent on grade, thickness and the finished-window design.
Specification-first customization
A controlled drawing identifies the geometry, usable aperture, surface requirements and mounting constraints needed for a practical feasibility review.
Application-specific coating discussion
Coating selection can be discussed around a defined operating band and angle of incidence. A broadband material does not mean one coating can meet every ultraviolet and infrared requirement.
Integrated enquiry review
Xinkehui's optical-material and non-standard-component background supports a discussion of drawing requirements, processing and inspection. The quotation must confirm which capabilities apply to the selected CaF2 component.
Specification and Acceptance Checklist
The following is a quotation checklist, not a guaranteed stock specification. Numerical tolerances, transmission, price and delivery terms require order-specific confirmation.
| Item | Specification or enquiry input |
|---|---|
| Material | Calcium fluoride (CaF2); required optical grade to be agreed |
| Optical function | Transmissive window; focusing elements require a separate prescription |
| Operating wavelengths | Specify the actual UV, visible or infrared band |
| Geometry and aperture | Controlled drawing with diameter or length and width, thickness and clear aperture |
| Dimensional tolerances | Order-specific feasibility review; no blanket catalogue tolerance |
| Surface quality | State the acceptance standard and permitted defects |
| Flatness or wavefront | State the required metric, test wavelength and usable aperture |
| Parallelism or wedge | Define according to instrument design |
| Coating | Specify whether uncoated or coating evaluation is required |
| Acceptance and packaging | Agree the test plan, inspection records and protective packaging |
Handling and Application Limits
Calcium fluoride requires careful handling and mounting. Avoid mechanical shock and excessive assembly stress, and obtain cleaning instructions for the actual substrate and coating. Review thermal conditions and exposed media before selecting the material. Published capabilities for sapphire or quartz cannot be transferred to CaF2 without confirmation.
Xinkehui: Company Capability and Project Support
Shanghai Xinkehui New Materials Co., Ltd. works in the development, processing and supply of semiconductor substrates and optical crystal materials. Its published company profile describes an engineering team, precision processing equipment, testing instruments and support for non-standard components.
The company profile lists cutting, grinding, lapping, polishing, coating, cleaning and inspection activities within its broader material business. These capabilities provide a basis for discussing custom optical components; they are not a blanket guarantee that every process, tolerance or test is available for every material.
For a project-specific quotation, Xinkehui reviews the material, drawing, operating conditions and acceptance requirements together. Inspection methods, coating performance, packaging and delivery terms should be agreed in the order specification. No customer endorsement, certification, patent count or batch-performance guarantee is implied by this page.
RFQ: Information for a Technical Quotation
- Required material grade, with UV or infrared acceptance requirements
- Controlled drawing and component geometry
- Thickness, usable aperture and mounting envelope
- Dimensional tolerances and edge requirements
- Operating band, angle of incidence and polarization if relevant
- Coating type or request for a coating feasibility review
- Surface-quality standard and flatness or wavefront requirement
- Laser, temperature, exposed-media and mechanical conditions
- Inspection records, traceability and packing requirements
- Quantity, destination and requested delivery schedule
Ten Procurement FAQs
1. What is a CaF2 optical window?
It is a calcium fluoride component intended to transmit light through an optical boundary. A plane window does not replace a lens prescription; confirm that the required part is a window rather than a focusing optic.
2. Can one CaF2 window cover both UV and infrared measurements?
That must be assessed against the actual wavelength bands, grade, thickness and coating. Material-level spectral descriptions are not a guarantee that a finished window meets both instrument requirements.
3. What should I specify for a UV spectroscopy enquiry?
State the lowest operating wavelength, required transmission or absorption acceptance, thickness, clear aperture and test method. Ask the supplier to confirm the material grade and the order-specific measurement conditions.
4. What should I specify for an infrared spectroscopy enquiry?
Provide the working spectral band, allowed transmission loss, window thickness and coating requirements. Suitability should be reviewed for the actual measurement range rather than assumed for all infrared wavelengths.
5. Can CaF2 windows be used in laser systems?
They can be considered for suitable wavelengths and conditions, but qualification requires power or pulse data, beam size, coating, mounting and acceptance requirements. No laser-damage threshold is asserted on this page.
6. Can I request a custom shape?
Submit the drawing, usable aperture, thickness, edge treatment and quantity for a feasibility review. Availability and achievable tolerances must be confirmed for that geometry and material; they are not implied by photographs.
7. Is an anti-reflection coating always necessary?
No. The decision depends on reflection losses, operating bandwidth, angle of incidence and environmental conditions. Define the required optical performance and request confirmation of an appropriate coating where needed.
8. How should I specify optical quality?
State the surface-quality standard, flatness or transmitted-wavefront requirement, test wavelength and clear aperture. Specify dimensional and parallelism requirements separately so that the acceptance criteria are unambiguous.
9. How should the windows be mounted and cleaned?
Handle the optics carefully, avoid impact and excessive mounting stress, and follow instructions for the actual substrate and coating. Cleaning method, exposed media and thermal conditions should be reviewed for the application.
10. Can Xinkehui confirm price, stock and delivery time?
Request an order-specific quotation with grade, drawing, coating, tests, quantity and destination. This page does not claim a fixed price, current stock, minimum quantity or guaranteed lead time.
Request a Product Review
Contact Xinkehui through this website's enquiry or WhatsApp channel with your drawing and the RFQ information above. Confirm the final specification, inspection requirements and commercial terms before placing an order.
