Detailed Product Description
|Focal Length Tolerance:
|Optical Glass, Fused Silica,etc
|3 Arc Minutes
have negative focal lengths
- diverge collimated incident light
- forms only virtual images which are seen through the lens
- reduce spherical aberration, coma and distortion at negative-infinite or near-infinite conjugate ratios
- with the concave surface facing the longest conjugate distance
These lenses are thicker at the edge than in the centre and flat on one side. The plano-concave lenses are used to expand light beams or to increase focal lengths in optical systems. They are often employed for beam expansion of high peak power pulsed lasers. A beam incident on a concave surface will be focused to a point outside the instrument.
|BK7, UV FS, CaF2
|40-20 scratch & dig
|90% of the diameter
|λ/8 @ 633 nm
|Surface irregularity for CaF2
|λ/4 @ 546 nm
|Paraxial focal length:
±2% @ 546 nm
±2% @ 355 nm
±2% @ 2940 nm
More about us:
Giai photonics Co.,Ltd is a leading supplier of optics and precision optical components ,specialized in a wide array of optical filters, multi-element lenses, lens coatings. We do this with skilled technicians, expert engineers, and modern optical fabrication equipment, the latest metrology. Our objective is to offer the finest quality precision components, optics and systems available to meet the service requirements and to exceed the expectations of our customers.
Terms of payment:
30% deposit by T/T,the balanced paid before shipment
Prepay 100% of the total before shipment
Q1: Are you a factory or trading company ?
A: We are factory located in Shenzhen, China.
Q2: Where is your factory located ?
A:F2,block C, Shen Chang Gang Industry Park,1st Rd. JingLong, Baolong Industry Zone, Longgang District Shenzhen.
Q3: Are there any stock or standard products?
A: We usually customize as per specific requirements, so please offer more detailed information about your requests, such as drawing(important), technical parameters, order quantity, use, material, photos, etc.
Q4: How about the samples policy?
A: We could send free samples for your reference, and the buyer please bear the delivery charge (through your express account for freight collect, or transfer the delivery charge to us for prepaid at your convenience). For some expensive samples, samples cost could be necessary.
Q5: If i place an order now, how long would it be before i got delivery ?
A: It would largely depend on the size of the order and the items you want.
when customer get the package,please first check the situation and the quality, if there is any quality problems made by us, we would like to change new ones or return back the money, also we will responsible for freight for custom. all things we put custom on the first consider way
Please feel free to contact me if you got any questions, we will reply you as soon as possible.
We are looking forward to establishing relationships with you