---
title: "849316 - Computer Controlled Optical Surfacing Machine"
ocid: "ocds-h6vhtk-052a92"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-052a92"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-052a92.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-052a92.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "DIAMOND LIGHT SOURCE LIMITED"
published: "2025-08-05"
---

# 849316 - Computer Controlled Optical Surfacing Machine

Buyer: DIAMOND LIGHT SOURCE LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-052a92

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## Summary

Diamond Light Source Limited, a central government public authority located at Diamond House, Didcot, UK, awarded a contract for the supply, delivery, installation, and commissioning of a Computer Controlled Optical Surfacing Machine. The procurement process, initiated as a tender, followed an open procedure and reached the award stage on 1st August 2025. This procurement falls within the Laboratory, Optical and Precision Equipments category for the Harwell Science and Innovation Campus in Oxfordshire. The title of the contract is "Computer Controlled Optical Surfacing Machine" and was awarded to Changsha AFiSy Technologies Co., Ltd. from China for a contractual period starting 1st August 2025 and ending 2nd February 2026, with a gross contract value of GBP 285,600.

This contract presents substantial opportunities for SMEs specialising in precision engineering and optical equipment, particularly those with capabilities in developing advanced surfacing technology compatible with diverse material specifications. The awarded contract included input and potential modifications from the supplier, indicating a collaborative approach beneficial for companies bringing innovative solutions. Businesses proficient in operating within open procurement frameworks, such as the open procedure used in this process, will find similar opportunities rewarding. SMEs can leverage this experience to refine their offerings and expand into related scientific and engineering sectors.

## Notice

Located on the Harwell Science and Innovation Campus in Oxfordshire, Diamond Light Source (DLS) is a leading-edge facility for science, engineering and innovation. Diamond allows researchers from academia and industry to investigate the structure and behaviour of the world around us at the atomic and molecular level. To continue delivering the world changing science that Diamond enables, the facility is being upgraded to Diamond-II, a coordinated programme of development that combines a major machine upgrade with new instruments and complementary improvements to optics,detectors, sample environment and delivery capabilities, and computing, as well as integrated and correlative methods. This will be transformative in speed and spatial resolution and will offer users streamlined access to enhanced instruments for life and physical sciences. The Optics and Metrology Group at Diamond Light Source wish to procure and develop a computer-controlled optical surfacing (CCOS) machine. The CCOS machine will be used to complement the ion beam figuring (IBF) project at Diamond. It will be used to polish a variety of materials, including single crystal silicon (Si), used for X-ray mirrors, grating substrates, and multilayer mirrors substrates. It should be compatible with a range of sample sizes, up to 1000 mm (length) x 100 mm (width) x 100 mm (height). The machine should allow for polishing of various surface geometries. Using appropriate slurries and polishing heads, the machine should be capable of "super-polishing" silicon to obtain micro-roughness Sq below 0.5 nm rms, and ideally below 0.3 nm rms (as measured over a field of view of < 1mm). The machine should also be capable of deterministically polishing and correcting optical surface errors with a spatial period from 5 mm to the full length of the mirror. It should be capable of polishing strongly-curved, concave surface geometries. It is expected that the CCOS machine will be based on: a motorised stage for the workpiece (which may have one or more axes of motion, such as rotation); a motorized tool holder with at least five axes of motion (X, Y, Z, and two pivot axes A and B); a rotating polishing tool head; and a slurry feed to controllably provide polishing slurry to the tool head when it is in motion against the workpiece. An interchangeable polishing tool head that can be quickly and easily replaced, to provide suitable polishing for different sizes, shapes or materials of various optical surfaces. A simple method is also required to change the type of polishing slurry. The scope of this contract is to supply, deliver, install and commission a computer-controlled optical surfacing machine based on an interchangeable rotating tool head, motorized tool holder, mounting stage for the workpiece, and polishing slurry feed. The supplier is encouraged to comment on any aspect of the specifications and to identify possible modifications that could lead to either improved performance or reduced cost (without compromising the performance specification)

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/046119-2025 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Goods |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | SME |
| Awardee scale | SME |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 5 Aug 2025 |
| Submission deadline | 2 Jul 2025 |
| Future notice date | Not specified |
| Award date | 22 Jul 2025 |
| Contract period | 31 Jul 2025 - 2 Feb 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £200,000 |
| Lots value | £200,000 |
| Awards value | £238,000 |
| Contracts value | £238,000 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | DIAMOND LIGHT SOURCE LIMITED |
| Locality | DIDCOT |
| Post town | Oxford |
| Postcode | OX11 0DE |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 | TLJ14 Oxfordshire CC |
| Local authority | Vale of White Horse |
| Electoral ward | Blewbury & Harwell |
| Westminster constituency | Didcot and Wantage |
| Delivery location | TLJ14 Oxfordshire CC |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | CHANGSHA AFISY TECHNOLOGIES |

## CPV Codes

### Divisions

- 38 - Laboratory, optical and precision equipments (excl. glasses)

### Codes

- 38000000 - Laboratory, optical and precision equipments (excl. glasses)

## Release History

- 5 Aug 2025 at 12:37 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/046119-2025
- 23 Jul 2025 at 14:09 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/042444-2025
- 2 Jun 2025 at 11:35 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/029124-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/046119-2025
  5th August 2025 - Contract details notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/042444-2025
  23rd July 2025 - Contract award notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/029124-2025
  2nd June 2025 - Tender notice on Find a Tender
- https://www.diamondtenders@diamond.ac.uk/Home.aspx
  Visit our web page: https://www.diamondtenders@diamond.ac.uk/Home.aspx Here Suppliers are required to complete a one-off simple registration form. You are then able to login to register an interest against the tender and download the tender documents.
- https://www.diamondtenders@diamond.ac.uk

## Notice URLs

- https://www.afisy.com/
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-052a92. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-052a92.json.